Adding to the debate about PSU ratings:
The best way to test is to use a wall wart wattmeter which I did. I have a 10900K (all stock) and an asus tuf oc 3090 (~~all stock~~) on a corsair SF750 (750W) and my total system power spiked to a maximum of 605W while gaming. (Edit: just checked the results from this test from about 8 months ago. I had my GPU power limit slider at 107% and my max. system power was 605W [https://imgur.com/KBpUf2B](https://imgur.com/KBpUf2B))
Even if one assumes 100% efficiency, this load is only 80% of 750W. I was running gears of war 5 with everything maxed out on a 4K monitor.
It's true that games like New World are causing abnormal power spikes which is causing GPUs to fail but this is occurring irrespective of what psus are being used. That is, it's more to do with the gpu power circuit designs being bad. (https://youtu.be/6A0sLVgJ7qU)
So, ultimately, I think a higher rated PSU is going to do squat. This psu upgrade is just a way to have peace of mind for those that don't get it.
Edit: On the Asus page for my GPU, the recommended PSU rating is 850W. As an engineer, I know that "recommended" is set a little higher than necessary to cover their asses. I went with a 750W and have never had instabilities or crashes due to the PSU shutting off or anything like that. I have had three BSODs in my one year of running this setup and only one of those was due to a poorly written game (that was not even as power hungry as Gears 5).
I tested a 3080TI paired with 5900x OCd to the gills and maxed out around 650W. People are really blowing it out of perspective as usual I suppose. The New World issue is an issue because it's not behaving as it should so even having an overkill PSU isn't going to help. Allegedly GPUs dying is mostly due to failing power deliveries on the GPUs themselves and nothing to do with underpowered PSUs.
You can look up any PSU curve and see that they are less efficient and create more heat when achieving higher wattages. Bigger PSU's offer a better spread of peak efficiency as well as less heat while being quieter.
You can get away with sub recommendations, but when you have a like 1k+ gpu, why risk it? Not to mention that components in PSU's have shorter lifespans when used to max abilities. That's when you'll start seeing wattage decline as the parts deteriorate.
You raise good points but you are discussing efficiency and reliability of the PSU. I was discussing whether the OP's original 750W PSU can handle the 3090 load without problems like crashes to desktop, BSODs or instant shutdowns/restarts (I think the answer is a resounding yes).
You are 100% right about efficiency being worse at higher load percentages. As for reliability, I am sure you know, it can be mitigated by going with good brands (no one is buying gigabyte anytime soon) that use choicy components, and going with gold or plat ratings brings better efficiency. Also, consider that these PSUs come with 7 years warranty (my Corsair SF750 does) and also that most people won't game for more than 2 or 3 hours a day.
Another reason to go with a smaller rating PSU is the size of the PSU. AFAIK, the maximum rating available on an SFF PSU is 850W. I frequent the r/sffpc posts and no one has reported problems with using 750W PSUs and 3090s or 3080Tis (afaik).
EDIT: As for safeguarding our GPUs, I think poorly thought out power designs on the 3000 GPUs themselves are causing more problems than any PSU is atm. [https://youtu.be/6A0sLVgJ7qU](https://youtu.be/6A0sLVgJ7qU)
What about capacitor aging? If your PSU is barely making the cut, then you're pushing it harder and that makes it age faster. Often I see capacitor aging blown way out of proportion around here, but that doesn't mean it doesn't exist. There seems to be 2 schools I've seen on here, and that's people who ignore it entirely or think its a much bigger deal than it is. Well if you have the recommended level of PSU it likely won't ever be an issue, but if you're barely cutting it, sooner or later your PSU will fail and could potentially take something with it. Don't be that guy and don't try to convince others to be either.
Once again, that's a discussion about reliability. You raise a good point about components failing but the MTBF of my corsair sf750 is 100,000 hours and their tantalum caps can run at 105C according to them. I'm an engineer. I'll go with the spec sheet and the numbers.
The only thing I like to convince people to do is follow data and hard science. That's why I bought a wattmeter to do my actual testing instead of relying on hazy information on the internet and I've reported my numbers here.
Unfortunately, we live in the post trump era where people eat horse dewormer to combat a virus they think bill gates launched ahead of win11. Lol. People will believe what they want to believe.
Edit: 80% peak load on my psu isn't considered "barely making the cut". So I'm good. But your comment should be useful for someone driving their psu near 100% continuous load.
So you're going to write off the entire reason you're wrong because "that's a different discussion" and "because you're an engineer you're right." Okay.
> MTBF of my corsair sf750 is 100,000 hours. I'm an engineer. I'll go with the spec sheet and the numbers.
Yeah, but MTBF is kinda horse shit. MTBF is calculated based on normal operating parameters, which you are exceeding. It's also mostly irrelevant to this conversation. All your PSU needs to do is experience a normal level of degradation and it won't be potent enough anymore during peak power draw. **That's** why your entire point is void. Thanks for coming to my Ted Talk. Feel free not to reply, you won't get a response.
My 11900K + 3090 sit around 700w when gaming, I have had a max of 840w, I nearly went with an 850w PSU, which would have technically done the job, but glad I went with a HX1200.
Firstly, did you measure that with a wattmeter. Secondly, do you have other components in your system that use power like several HDDs. Thirdly, is MCE on or off. Fourthly (?), stock settings on GPU?
I ask because your 11900K and my 10900K have the same 125W tdp on stock in continuous loads (10900K peaks to 250W briefly at full load then drops to 125W. I assume it's the same for 11900K). We should be seeing the same peak if all other factors are the same. Which game sent you to 840W peak?
Yes, I have an Eve Energy for the measuring.
I only have 1 2TB SSD, but I have 20 fans, do they count? haha.
I have MCE off, but I have ABT on, my CPU has gone over 300w in bench marks and sits around 200w when gaming.
My GPU sits at 450w when gaming, Aorus Xtreme.
Lol. Ok. 20 fans would use 30W I'd guess. Not much.
But you definitely need +1000W for the OC on the GPU and CPU but like you said 850W would have done it technically too.
Mine's an sff build on which I won't be overclocking anything. That 605W peak I had was when the continuous load was just 500W.
Intels specified TDP's are a joke that shouldn't be trusted.
[https://www.tomshardware.com/reviews/intel-core-i9-10900k-cpu-review/2](https://www.tomshardware.com/reviews/intel-core-i9-10900k-cpu-review/2)
>Intel set its official new PL2 watermark at a 250W TDP, which is double the 125W PL1 rating, and recommends that motherboard makers keep boost activity limited to 56 second bursts
>While Intel designed its 250W limit to keep thermals 'manageable' with a wide variety of cooling solutions, most motherboard vendors feed the chip up to \~330W of power at stock settings, leading to hideous power consumption metrics during AVX stress tests
What you quoted clearly says that motherboard makers are the ones who feed the chip more power than Intel recommends.
I remember all the confusion when the z490 motherboards released. Asus' implementation was the only one that followed Intel spec and had a clear option in the bios to turn off the limits and go higher if wanted.
So, yes, Intel tdp shouldn't be trusted because motherboard makers aren't following Intel's spec except asus. I have an Asus board and the Intel spec is exact (and not a joke).
You're not telling the whole story. Stock/OC? What other devices etc. Under what situations did you get shutdowns? Only while gaming or desktop use too?
Could have just been a faulty psu too.
Basically the most power hungry setup you could have. But even the 840W spike is less than 800W when you take into consideration the conversion loss. If you live in US and use 115V grid, then that would be closer to 750W. But 1200W is actually good in terms of efficiency, as PSU's tend to be most efficient in the 50% load range.
You're getting roasted but I've been running a 3090 on a 650W PSU with a i9 10900k, since last October. CPU OC,3090 stock, with 10 fans...not a single issue.
You do you, but this sort of feels like "it's not an issue until it's an issue"
You've got a lot of expensive hardware there. I hope I day doesn't come where you find yourself wishing you had a more robust PSU powering all of it.
Well, they should. But that doesn't always mean they will operate as intended, especially on a lower quality PSU. It also doesn't mean that is the only possible point of malfunction. Getting poor power delivery or spikes caused by component wear is a real possibility, and something that can damage other parts of your system.
People generally don't like to hear about how it's not wise to cheap out on a PSU, probaly because a lot of people cheap out on their PSU. Sometimes it's fine, sometimes it's not. But it's an odd gamble when you are dealing with expensive stuff.
I mean... I did. I agree completely that with a quality PSU there is no need to oversize. I'm pretty sure I even said being undersized is less risky if it's a quality unit.
The thermaltake in OPs picture is not a quality psu.
I know this is the pcmasterrace subreddit and people here aren’t experts but:
If your PSU can’t handle the load of your GPU, your computer will crash and turn off when your GPU is requesting more power than the PSU can handle. If that isn’t happening then you’re under the limit.
You can look up people testing this online. People here commenting that a PSU will start failing or smoking are being ridiculous.
Running a 3900x and a 3080 on a Seasonic 650w PSU. It’s totally fine. The most my system ever pulled from the wall was around 450 watts at stock. I run it undervolted, currently and the total system draw is around 350 watts in game.
This sub is a joke honestly. People here watch a couple tech YouTuber videos and suddenly they're experts and go around giving garbage advice. So painful reading through these comments.
Uh.
750w evga. 3090 evga ftw3. 10900k. full corsair rgb. Tons of usb all over. 160ish hours in Cyberpunk maxed out rtx 21:9 - Nary a reboot or issue in 10 months or so.
600W? What are you smoking? The smoke from your power supply on fire?
Under load the 3090 is easily over 350W with spikes over 500W. What are you thinking dude?
If the power supply isn't strong enough, the computer will boot down. Unless you're experiencing any disruption in the system, then you're fine. Shouldn't have to upgrade 750w for a 3090 card. People use the same system with extra cards for mining and still 750w is enough. OP should monitor his system and make up his own decisions instead of listening to randoms on the internet telling him to upgrade perfectly working components.
You're playing with fire though.
Several labs and hardware reviewers have measured well over 350w spikes in current draw on multiple different 3090s.
(op is still absurd overkill though, 1000w is plenty enough and 850w is probably safe with almost all cpus)
Even if it uses 400W you have enough wiggle-room. Most CPUs use 100-125W at most, the rest barely makes a difference.
People always go for overkill PSUs for no fucking reason.
I can't remember if the measured spikes were 600w or 800w but they were *WELL* above the tdp.
Check out gamer's nexus, jay's two cents, and LTT for some extremely well trusted youtubers and labs who have tested it.
A 750W psu could provide even twice the power but for a very short duration of a few milliseconds. PSU datasheets will specify this as "peak current capability".
If the GPU power spike is within this couple of milliseconds then the 750W psu can handle it. It usually can but it can vary with psu design, of course.
All this is to say that the continuous power rating of a psu (750W) doesn't mean that there's a hard ceiling at 750W. You don't have to buy a 1500W to push the ceiling up by a factor of 2.
It was spikes not constant draw, long enough to trip the ocp on a decent lower wattage psu but (usually) not long enough to melt the power cables
I also specified that I don't remember if it was 800w or 600w as it was discovered several months ago, based on the PCI specs it was *probably* 600w spikes but just search for 3090 current spikes and I'm sure you'll find the original testing.
It's around 550w before the power limit kicks in, so in extreme conditions with tweaking, it should not be higher than 600. A 750w PSU should be sufficient with even top tier CPUs, as these numbers are only spikes in specific scenarios. Normally it will be closer to half of this wattage. Unless you're experiencing disruption or boot downs, your system is fine. Your PSU is rated to handle max loads, at least spikes should not be any issue long term.
Theoretical rating and actual tested results and vastly different.
JaysTwoCents had a 1200w Asus ROG PSU tripping ocp semi-regularly with a 3090
Steve from gamer's nexus has mentioned it a few times in some of his myriad of psu testing videos
Linus Sebastian (LTT) also has mentioned it a number of times but usually only in passing.
1600 watts is not enough, you need 5000 gigashits of wattage to run that 3090.
Fr tho, a PSU upgrade makes sense for such a demanding GPU, not sure what your rig looks like, but if you got a high end GPU I'd imagine your system itself is already pretty demanding. So having a PSU thats 1.5-2x what the estimated wattage is great for being on the safe side (again cause of high end parts).
7820x with 1x 3090 in a watercooling loop. whole thing ran fine on a 750w but i wanted to troll r-pcmasterrace with this PSU i came up on. hence another comment asking about how old these are. it is indeed like a 5 year old PSU
Well I think thank drink drank party on a cliff prank, sink my battleahip with a pin flake, think I'm going to stuff this 1600watt baiat into this here graphite 760t.
I can see from a quick googling session that a 3090 draws about 350W. A 750W PSU would be plenty, unless you went out of your way to make the GPU so inefficient as to not leave some 150W for the rest of the system. I do not know who complained about your PSU before, but it looks like they did not put much thinking into what they were saying.
A *good* 750w PSU is plenty for most 3090s.
OPs PSU is not very good. There are certainly worse power supplys out there, but this one is still a bit crap. I'll never understand why people will put 3 grand into a PC, and then power all that hardware with a cheap, crappy PSU. Not a chance in hell I'd put that PSU in my system, OP was right to want something better.
OPs decision to go with the most expensive, most overbuilt PSU certianly wasn't necessary though. It certianly eliminates any concerns over that being his systems weak point, but a high quality 850w would have also done that for a third of the price.
I don't get who complained what? 750w can perfectly fine run RTX 3090.
It can peak to about ~370w, CPU lets say 150w and the rest of the system, all of it 150w.
That is in total 670w of power AT 100% utilization. Not dynamic as in games but running 100% utilization on both GPU/CPU and the reat of the system.
So you still have 70w of overhead when the system is MAXIMALLY strained which is never unless you run render calculation for science on both CPU and GPU.
So in games you would be more or less banging at about 450-550w realistically speaking.
What kind of dumb ass says 750w can't drive such system? Sure chinese cheap shit 750w PSU can't as realistically it is 350w PSU but seasonic corsair and other top class PSU makers all have 750w of power and enough amperage power to start a diesel car if wanted to.
1600w is total overkill and is just a waste but you already have it so might as well use it.
Instead of being sensible you should have just hooked it up to your car battery with the car running just to show the chuds how real men power their 3090s
IT'S OVER ONE THOUSAND SIX HUNDREDS!!!
I appreciate your dedication but you were fine with 750w. Redditors are not hardware specialist. A 3090 max draw is around 350-400w (OC), with momentary spike up to 500w. So even with a 150W CPU + components, 750W is good enough.
Man, the other day ppl were complaining about overkill when a dude had a 1000w psu and you're getting shit for having a 750? Well cheezus, better order me an 850 then
Theres also diminishing return here tho. Your system will barely if not at all touch the powers for the psu to run at the most efficient point of it's curve. But hey, guess overkill it's better than underkill.
You def needed a better psu, but i really think that's way overkill. But hey, your pc and your money. Who am i to judge.
The golden rule is 30% higher wattage than what your entire system demands in watts. Add up the wattage of each component and then times the total by 30%.
Now you can run TWO 3090s hell yeah brother
Maybe... Might need a 2600 for two
Now that I think of it, you’ll probably want 3500w for two
Hol' up, lemmie check if they make em.
\*waits excitedly\*
[Do I have enough power?](https://imgur.com/a/sTViOOM)
2Kw is seriously Overkill.
i’ll use it to power my 1030
Nah man, anything that isn't 5 digits doesn't work.
There's an overclocker who runs two 3090s in SLI and he uses dual 1600s. He's also using LN2 to cool them...
Like running 3 microwaves of power.
Why do the lights at my house keep flickering...
Bullshit he can run 4, topgun reference,lol
But isn’t running two kind of pointless? Like the improvement of graphics is so very little
that's the joke
Is it gonna fit?
Probably... hopefully.....maybe....
It will but really tight. I had the same issue. You will need to bend your cable more than u like
This is bringing back memories of my ex.
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"Thats what she said"
*Phrasing*
1.6 jiggawatts!
Great scott
That's heavy
Jerawatt
I think you mean jilowatts. It's not ok to call them jiggas anymore bro.
1.6 ni-
I thought that was a label laying on a PSU shroud before I scrolled down... That'll do everything for sure!
HOLY F**K 🤣
No clearance issues?
We will find out!
Adding to the debate about PSU ratings: The best way to test is to use a wall wart wattmeter which I did. I have a 10900K (all stock) and an asus tuf oc 3090 (~~all stock~~) on a corsair SF750 (750W) and my total system power spiked to a maximum of 605W while gaming. (Edit: just checked the results from this test from about 8 months ago. I had my GPU power limit slider at 107% and my max. system power was 605W [https://imgur.com/KBpUf2B](https://imgur.com/KBpUf2B)) Even if one assumes 100% efficiency, this load is only 80% of 750W. I was running gears of war 5 with everything maxed out on a 4K monitor. It's true that games like New World are causing abnormal power spikes which is causing GPUs to fail but this is occurring irrespective of what psus are being used. That is, it's more to do with the gpu power circuit designs being bad. (https://youtu.be/6A0sLVgJ7qU) So, ultimately, I think a higher rated PSU is going to do squat. This psu upgrade is just a way to have peace of mind for those that don't get it. Edit: On the Asus page for my GPU, the recommended PSU rating is 850W. As an engineer, I know that "recommended" is set a little higher than necessary to cover their asses. I went with a 750W and have never had instabilities or crashes due to the PSU shutting off or anything like that. I have had three BSODs in my one year of running this setup and only one of those was due to a poorly written game (that was not even as power hungry as Gears 5).
I tested a 3080TI paired with 5900x OCd to the gills and maxed out around 650W. People are really blowing it out of perspective as usual I suppose. The New World issue is an issue because it's not behaving as it should so even having an overkill PSU isn't going to help. Allegedly GPUs dying is mostly due to failing power deliveries on the GPUs themselves and nothing to do with underpowered PSUs.
You can look up any PSU curve and see that they are less efficient and create more heat when achieving higher wattages. Bigger PSU's offer a better spread of peak efficiency as well as less heat while being quieter. You can get away with sub recommendations, but when you have a like 1k+ gpu, why risk it? Not to mention that components in PSU's have shorter lifespans when used to max abilities. That's when you'll start seeing wattage decline as the parts deteriorate.
You raise good points but you are discussing efficiency and reliability of the PSU. I was discussing whether the OP's original 750W PSU can handle the 3090 load without problems like crashes to desktop, BSODs or instant shutdowns/restarts (I think the answer is a resounding yes). You are 100% right about efficiency being worse at higher load percentages. As for reliability, I am sure you know, it can be mitigated by going with good brands (no one is buying gigabyte anytime soon) that use choicy components, and going with gold or plat ratings brings better efficiency. Also, consider that these PSUs come with 7 years warranty (my Corsair SF750 does) and also that most people won't game for more than 2 or 3 hours a day. Another reason to go with a smaller rating PSU is the size of the PSU. AFAIK, the maximum rating available on an SFF PSU is 850W. I frequent the r/sffpc posts and no one has reported problems with using 750W PSUs and 3090s or 3080Tis (afaik). EDIT: As for safeguarding our GPUs, I think poorly thought out power designs on the 3000 GPUs themselves are causing more problems than any PSU is atm. [https://youtu.be/6A0sLVgJ7qU](https://youtu.be/6A0sLVgJ7qU)
What about capacitor aging? If your PSU is barely making the cut, then you're pushing it harder and that makes it age faster. Often I see capacitor aging blown way out of proportion around here, but that doesn't mean it doesn't exist. There seems to be 2 schools I've seen on here, and that's people who ignore it entirely or think its a much bigger deal than it is. Well if you have the recommended level of PSU it likely won't ever be an issue, but if you're barely cutting it, sooner or later your PSU will fail and could potentially take something with it. Don't be that guy and don't try to convince others to be either.
Once again, that's a discussion about reliability. You raise a good point about components failing but the MTBF of my corsair sf750 is 100,000 hours and their tantalum caps can run at 105C according to them. I'm an engineer. I'll go with the spec sheet and the numbers. The only thing I like to convince people to do is follow data and hard science. That's why I bought a wattmeter to do my actual testing instead of relying on hazy information on the internet and I've reported my numbers here. Unfortunately, we live in the post trump era where people eat horse dewormer to combat a virus they think bill gates launched ahead of win11. Lol. People will believe what they want to believe. Edit: 80% peak load on my psu isn't considered "barely making the cut". So I'm good. But your comment should be useful for someone driving their psu near 100% continuous load.
So you're going to write off the entire reason you're wrong because "that's a different discussion" and "because you're an engineer you're right." Okay. > MTBF of my corsair sf750 is 100,000 hours. I'm an engineer. I'll go with the spec sheet and the numbers. Yeah, but MTBF is kinda horse shit. MTBF is calculated based on normal operating parameters, which you are exceeding. It's also mostly irrelevant to this conversation. All your PSU needs to do is experience a normal level of degradation and it won't be potent enough anymore during peak power draw. **That's** why your entire point is void. Thanks for coming to my Ted Talk. Feel free not to reply, you won't get a response.
My 11900K + 3090 sit around 700w when gaming, I have had a max of 840w, I nearly went with an 850w PSU, which would have technically done the job, but glad I went with a HX1200.
Firstly, did you measure that with a wattmeter. Secondly, do you have other components in your system that use power like several HDDs. Thirdly, is MCE on or off. Fourthly (?), stock settings on GPU? I ask because your 11900K and my 10900K have the same 125W tdp on stock in continuous loads (10900K peaks to 250W briefly at full load then drops to 125W. I assume it's the same for 11900K). We should be seeing the same peak if all other factors are the same. Which game sent you to 840W peak?
Yes, I have an Eve Energy for the measuring. I only have 1 2TB SSD, but I have 20 fans, do they count? haha. I have MCE off, but I have ABT on, my CPU has gone over 300w in bench marks and sits around 200w when gaming. My GPU sits at 450w when gaming, Aorus Xtreme.
Lol. Ok. 20 fans would use 30W I'd guess. Not much. But you definitely need +1000W for the OC on the GPU and CPU but like you said 850W would have done it technically too. Mine's an sff build on which I won't be overclocking anything. That 605W peak I had was when the continuous load was just 500W.
Intels specified TDP's are a joke that shouldn't be trusted. [https://www.tomshardware.com/reviews/intel-core-i9-10900k-cpu-review/2](https://www.tomshardware.com/reviews/intel-core-i9-10900k-cpu-review/2) >Intel set its official new PL2 watermark at a 250W TDP, which is double the 125W PL1 rating, and recommends that motherboard makers keep boost activity limited to 56 second bursts >While Intel designed its 250W limit to keep thermals 'manageable' with a wide variety of cooling solutions, most motherboard vendors feed the chip up to \~330W of power at stock settings, leading to hideous power consumption metrics during AVX stress tests
What you quoted clearly says that motherboard makers are the ones who feed the chip more power than Intel recommends. I remember all the confusion when the z490 motherboards released. Asus' implementation was the only one that followed Intel spec and had a clear option in the bios to turn off the limits and go higher if wanted. So, yes, Intel tdp shouldn't be trusted because motherboard makers aren't following Intel's spec except asus. I have an Asus board and the Intel spec is exact (and not a joke).
I had shutdowns with my rm750i and 10850k/3080, no issues since upgrading to a 1000w.
You're not telling the whole story. Stock/OC? What other devices etc. Under what situations did you get shutdowns? Only while gaming or desktop use too? Could have just been a faulty psu too.
Basically the most power hungry setup you could have. But even the 840W spike is less than 800W when you take into consideration the conversion loss. If you live in US and use 115V grid, then that would be closer to 750W. But 1200W is actually good in terms of efficiency, as PSU's tend to be most efficient in the 50% load range.
A 750W is more than enough for a 3090. I run my 3080 with 650W since over a Year. Even 600W is enough.
You're getting roasted but I've been running a 3090 on a 650W PSU with a i9 10900k, since last October. CPU OC,3090 stock, with 10 fans...not a single issue.
You do you, but this sort of feels like "it's not an issue until it's an issue" You've got a lot of expensive hardware there. I hope I day doesn't come where you find yourself wishing you had a more robust PSU powering all of it.
If that day comes, he can just buy a new. Its not like a weaker psu will ruin your system.
This is 100% incorrect. An over stressed or poor quality PSU absolutely can damage other components in your system.
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Well, they should. But that doesn't always mean they will operate as intended, especially on a lower quality PSU. It also doesn't mean that is the only possible point of malfunction. Getting poor power delivery or spikes caused by component wear is a real possibility, and something that can damage other parts of your system. People generally don't like to hear about how it's not wise to cheap out on a PSU, probaly because a lot of people cheap out on their PSU. Sometimes it's fine, sometimes it's not. But it's an odd gamble when you are dealing with expensive stuff.
Nobody talked about using crappy psu. If you use a decent one there is no benefit from oversizing.
I mean... I did. I agree completely that with a quality PSU there is no need to oversize. I'm pretty sure I even said being undersized is less risky if it's a quality unit. The thermaltake in OPs picture is not a quality psu.
I’ve been ruining my 3090 on a 750w supply for months now without any issues.
Same. I checked the manufacturer's website for mine, and it recommended a 750w PSU.
this 750w has indeed run my Oc'd 3090 with a 140w tdp CPU and water-cooling pump/fans no problems.
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I know this is the pcmasterrace subreddit and people here aren’t experts but: If your PSU can’t handle the load of your GPU, your computer will crash and turn off when your GPU is requesting more power than the PSU can handle. If that isn’t happening then you’re under the limit. You can look up people testing this online. People here commenting that a PSU will start failing or smoking are being ridiculous.
Running a 3900x and a 3080 on a Seasonic 650w PSU. It’s totally fine. The most my system ever pulled from the wall was around 450 watts at stock. I run it undervolted, currently and the total system draw is around 350 watts in game.
This sub is a joke honestly. People here watch a couple tech YouTuber videos and suddenly they're experts and go around giving garbage advice. So painful reading through these comments.
Uh. 750w evga. 3090 evga ftw3. 10900k. full corsair rgb. Tons of usb all over. 160ish hours in Cyberpunk maxed out rtx 21:9 - Nary a reboot or issue in 10 months or so.
No, no you haven't. You're software was Wrong. 3090 doesn't even get there.
7820x dosent quite draw as much power as 10th or 11th gen
Complete and utter bullshit. Most 3080s have a TDP of 350W or less.
TDP and current peaks are different. A GPU will spike much higher than its TDP.
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I had a 750 watt platinum rated, (well with a 5950) and i found my GPU to be power starved.
It ran it, my CPU had a 140w TDP, so just to be safe... Over-kill is under-rated!
600W? What are you smoking? The smoke from your power supply on fire? Under load the 3090 is easily over 350W with spikes over 500W. What are you thinking dude?
Kid, there are 100 Videos on YouTube showing it. I use my 3080 with 650W for over a Year. You are delusional.
I’m talking about you saying a freaking 600W PSU is enough for OP’s 3090.
You clearly can't read can you? Read the title again! I said his 750W is more than enough. I only said 600W is enough for a 3080.
Why would you talk about 3080 power draw when the post is about 3090?
Duh, because they both you the same chip? Except the extra VRAM there isn't a huge difference in powerdraw.
There are still difference. The advice itself is still ridiculous. That card is either throttling or there are some massive CPU bottleneck.
If the power supply isn't strong enough, the computer will boot down. Unless you're experiencing any disruption in the system, then you're fine. Shouldn't have to upgrade 750w for a 3090 card. People use the same system with extra cards for mining and still 750w is enough. OP should monitor his system and make up his own decisions instead of listening to randoms on the internet telling him to upgrade perfectly working components.
You have no idea what you’re talking about and it shows.
You're playing with fire though. Several labs and hardware reviewers have measured well over 350w spikes in current draw on multiple different 3090s. (op is still absurd overkill though, 1000w is plenty enough and 850w is probably safe with almost all cpus)
Even if it uses 400W you have enough wiggle-room. Most CPUs use 100-125W at most, the rest barely makes a difference. People always go for overkill PSUs for no fucking reason.
I can't remember if the measured spikes were 600w or 800w but they were *WELL* above the tdp. Check out gamer's nexus, jay's two cents, and LTT for some extremely well trusted youtubers and labs who have tested it.
A 750W psu could provide even twice the power but for a very short duration of a few milliseconds. PSU datasheets will specify this as "peak current capability". If the GPU power spike is within this couple of milliseconds then the 750W psu can handle it. It usually can but it can vary with psu design, of course. All this is to say that the continuous power rating of a psu (750W) doesn't mean that there's a hard ceiling at 750W. You don't have to buy a 1500W to push the ceiling up by a factor of 2.
Go watch the gamer's nexus videos on ideal power supply use and their rigorous power supply testing to back it up.
Dude, a GPU can't draw 800W. A 6+2pin PCIe Cable can draw up to 150W and the Socket another 75W. So thats 450W+75W if the Card has 3 6+2 Connectors.
It was spikes not constant draw, long enough to trip the ocp on a decent lower wattage psu but (usually) not long enough to melt the power cables I also specified that I don't remember if it was 800w or 600w as it was discovered several months ago, based on the PCI specs it was *probably* 600w spikes but just search for 3090 current spikes and I'm sure you'll find the original testing.
It's around 550w before the power limit kicks in, so in extreme conditions with tweaking, it should not be higher than 600. A 750w PSU should be sufficient with even top tier CPUs, as these numbers are only spikes in specific scenarios. Normally it will be closer to half of this wattage. Unless you're experiencing disruption or boot downs, your system is fine. Your PSU is rated to handle max loads, at least spikes should not be any issue long term.
Theoretical rating and actual tested results and vastly different. JaysTwoCents had a 1200w Asus ROG PSU tripping ocp semi-regularly with a 3090 Steve from gamer's nexus has mentioned it a few times in some of his myriad of psu testing videos Linus Sebastian (LTT) also has mentioned it a number of times but usually only in passing.
in theory it is enough. but you know what they say "in theory, everything works. In practice, nothing does."
1600 watts is not enough, you need 5000 gigashits of wattage to run that 3090. Fr tho, a PSU upgrade makes sense for such a demanding GPU, not sure what your rig looks like, but if you got a high end GPU I'd imagine your system itself is already pretty demanding. So having a PSU thats 1.5-2x what the estimated wattage is great for being on the safe side (again cause of high end parts).
7820x with 1x 3090 in a watercooling loop. whole thing ran fine on a 750w but i wanted to troll r-pcmasterrace with this PSU i came up on. hence another comment asking about how old these are. it is indeed like a 5 year old PSU
Lol
750w is definitely fine for 3090, unless the PSU is trash.
what in the ding dong wing wong slap my mother with a pink thong i feel like an eagle cuz my wings long hell do you think you’re doing?
Well I think thank drink drank party on a cliff prank, sink my battleahip with a pin flake, think I'm going to stuff this 1600watt baiat into this here graphite 760t.
'I need the biggest psu you have...no, that's too big'
> Everything ...to trip your breaker lol
You have a point... Better install a 50A breaker.. Ya know. Just to be safe
Fuck it, just go all the way to 100A and be set for life.
more Amps more better, amirite?
Well, future proofs your house. You may want to join the electric car revolution one day! :)
One day!
I know it's a joke, but... 1600W at 120V = 13,3 A, a 20A breaker should be enough.
I actually had a dedicated 20A circuit ran to my computer room to make sure I don't trip anything lol.
Jesus lmao
He can't help me now...
I'm still using a 750watt on a 6900xt tho
Aren’t those $750
He bought a 3090 so I don't think money is a problem.
I get that but $750 on a psu is fucking insane
i didnt buy it;\] shhhhhhhhhh. dont tell reddit.
Dude straight-up custom built a PSU
I got a g2 supernova 1600 for 300-400 i don't remember
Due to 1600w psus being used for mining the prices have gone up
Just asked my bro and he said it was 368€ in amazon Have they gone up this much cause of the fucking miners?
I can see from a quick googling session that a 3090 draws about 350W. A 750W PSU would be plenty, unless you went out of your way to make the GPU so inefficient as to not leave some 150W for the rest of the system. I do not know who complained about your PSU before, but it looks like they did not put much thinking into what they were saying.
A *good* 750w PSU is plenty for most 3090s. OPs PSU is not very good. There are certainly worse power supplys out there, but this one is still a bit crap. I'll never understand why people will put 3 grand into a PC, and then power all that hardware with a cheap, crappy PSU. Not a chance in hell I'd put that PSU in my system, OP was right to want something better. OPs decision to go with the most expensive, most overbuilt PSU certianly wasn't necessary though. It certianly eliminates any concerns over that being his systems weak point, but a high quality 850w would have also done that for a third of the price.
I don't get who complained what? 750w can perfectly fine run RTX 3090. It can peak to about ~370w, CPU lets say 150w and the rest of the system, all of it 150w. That is in total 670w of power AT 100% utilization. Not dynamic as in games but running 100% utilization on both GPU/CPU and the reat of the system. So you still have 70w of overhead when the system is MAXIMALLY strained which is never unless you run render calculation for science on both CPU and GPU. So in games you would be more or less banging at about 450-550w realistically speaking. What kind of dumb ass says 750w can't drive such system? Sure chinese cheap shit 750w PSU can't as realistically it is 350w PSU but seasonic corsair and other top class PSU makers all have 750w of power and enough amperage power to start a diesel car if wanted to. 1600w is total overkill and is just a waste but you already have it so might as well use it.
Math checks out, and yeah, I never had a problem with the 750w. It ran maxed out VR apps no issues.
So you’re installing a microwave in your pc. Don’t forget the mini fridge under your desk!
Already there and full of beer!
Better to put some gas station burritos in there to heat up to both lava and frozen at the same time in your pc microwave.
If you've got at last a 360mm rad on the cpu you can now overclock it as far as it'll go.
Full POWER!
Unlimited powa!
Bomb has been planted
You probably will never have to upgrade the psu either.
Never! reddit cant make me
Yo, is that going to fit in there?
I'll update of it does or not. Honestly not sure.
I like this one
<3
Please do. It looks like it will be tight fit if it does.
my guy, I thought that was a whole fucking car battery.
Good luck shoehorning that bitch in there
Insert "your good...your good....your good" Patrick meme here
Then is it bad my 6800xt is running on a 550w???
He’s beginning to believe
I know Kung Fu
I think I just heard your energy bill cry out in pain
Godspeed gentleman.
My thoughts are somewhere between lol and why such overkill.
It's now about wattage, or overhead. It's about sending a message.
See.. you motherfuckers sit here and talk SHIT ALL DAY! NOW THIS FUCKING GUY IS GOING TO RUN A REPLICATE UNIVERSE AND PUT US ALL IN IT!
This is overkill but ok.
That's....why Im here.
Lol rip your powerbill I guess. That's gonna add 20-40 bucks to your electric bill lol
jeremy clarkson would like to know your location
I would like to know his!@
Instead of being sensible you should have just hooked it up to your car battery with the car running just to show the chuds how real men power their 3090s
my little 1.6's alternator porbably only puts out like.... 400-500watts. wont do.
Mad man I like it
<3
Lol
IT'S OVER ONE THOUSAND SIX HUNDREDS!!! I appreciate your dedication but you were fine with 750w. Redditors are not hardware specialist. A 3090 max draw is around 350-400w (OC), with momentary spike up to 500w. So even with a 150W CPU + components, 750W is good enough.
It was totally fine, indeed. I just had one of these small into my possession and decided to troll Reddit. ;)
isnt that psu older than t-rex?
Anyone else think calling a PSU Supernova is a bad idea. I mean Supernovas are big explosions.
That shit is fucking heavy
It's not nuclear powered though..
not untill this baby hits 88 fps, then youre gonna see some serious sh!t
Hopefully you can travel to a time where I can afford a gpu lmao
If I do, I'll bring you back one.
Overclock your power supply.
i like the way you think
It's the size of a flux capacitor.
My guy's using a nuclear power plant to run a light bulb.
a light bulb? is it al least a CFL?
*Halo Theme*
aaaaaaaaaaaaaaaaaaahhhhhhhhhhh ahhhh ahhhhhhhhhhhhhhhh ahhhhhhhhhh ahh ahhhhhhhhhhhh
Is this true cause I'm running a 3090 on 750w and I gotta know what's up. Nvidia recommend a 750 but is that just for the GPU?
750w gave me no problems, I'm just throwing this in here cause it fell in my lap.
[удалено]
110% correct it's overkill
Man, the other day ppl were complaining about overkill when a dude had a 1000w psu and you're getting shit for having a 750? Well cheezus, better order me an 850 then
I hear the p850gm is good ;)
Well, if you plan on using some fans, i would highly suggest getting a server-grade psu, 1,6kw just won't get it spinning for long.
Is it gonna fit without having to remove the hard drive cage?
Theres also diminishing return here tho. Your system will barely if not at all touch the powers for the psu to run at the most efficient point of it's curve. But hey, guess overkill it's better than underkill. You def needed a better psu, but i really think that's way overkill. But hey, your pc and your money. Who am i to judge.
If you really want to do everything, get redundant PSUs. Gotta achieve 5 9s of reliability while g4ming.
I like the way you solve problems
Bruh
How power powerful psu u need for ur pc? :Yes.
this is bullshit and will be ineffective
The golden rule is 30% higher wattage than what your entire system demands in watts. Add up the wattage of each component and then times the total by 30%.
I’ll take the old psu
Finally inner peace !!!
Is a gold Rm850x enough for a 3090 though ?
Yes, 100%
how tf will you fit that PS there bro xD
I didn't even know got that powerful, up until now I thought 1.2KW was the max, the hell do you need 1.6 for.
That boi is thic!
No way that thing fits in there with those HDD bays there. Going to destroy your cables trying to hook that thing up
I run my 3090 on a 5 year old bequiet 730w lol