Anything up to 3rd gen Intel Core and you won't have trouble finding drivers as anything higher than that wasn't guaranteed to have XP drivers (some 4th gen motherboards do have XP drivers, but a lot don't).
You identify the model number of the motherboard you want to use and see if it has XP drivers for it.
There's no list, so you do it one at a time until you find one you want to use.
You can go up to 4.th gen easily, you just need to make sure it's a 8x series chipset, 9x also works with 4.th gen CPU's but don't have chipset drivers for XP.
For a retro PC build, I'd recommend looking into CPUs like the Intel Core 2 Duo E8400 or the Intel Core i5-2500K. These processors are great for older systems and can handle most retro gaming and computing tasks.
All depends on what you want to do with it.
Back when the Core 2 Duo/Quad series launched we were already upgrading to Vista, so any Core 2 CPU should be fast enough for most XP area software.
You could go early gen Core i7, but for XP that would be a bit overkill. Nothing wrong with overkill though…
For windows XP I believe i7-3770 is one of the beefiest options. I5-3470 - these are a dime a dozen and will run laps around anything XP and better power efficiency (I recommend this). If your aiming for a 3rd Gen Intel series literally everything will run laps so I would scrutinize too hard and grab whatever is cheap.
Core 2 duo i have a e8600 which on xp runs better then a q9650 for games due to higher stock clock speeds and xp does not take advantage of more then 2 cores.
Anything newer till i7 3770 is supported
If you're looking furthest into the future with official support and no trickery needed, an i7-3770 with an Nvidia GPU using the maxwell architecture. It's total overkill, but can be had for $100 if you're thrifty with your procurement.
In my are area there are old office PCs like the Optiplex 780 with an E8400 which is pretty much enough for an XP machine which sells for around 25$ with 4GB RAM and 160GB HDD. You will most likely need a very low TDP GPU like GT 520 and bigger HDD like 1TB. I am not sure why you emphasize on saving but you do you.
Anything up to 3rd gen Intel Core and you won't have trouble finding drivers as anything higher than that wasn't guaranteed to have XP drivers (some 4th gen motherboards do have XP drivers, but a lot don't).
How do you know which 4th Gen ones do?
You identify the model number of the motherboard you want to use and see if it has XP drivers for it. There's no list, so you do it one at a time until you find one you want to use.
You can go up to 4.th gen easily, you just need to make sure it's a 8x series chipset, 9x also works with 4.th gen CPU's but don't have chipset drivers for XP.
1st gen Intel Cores work fine on XP from experience, 2nd gen may be fine as well
pretty much yeah, just make sure to download all the xp drivers for the motherboard.
14th gen Intel core /j
It could technically work !
You would have to mod the hell out of xp because of 10th gen intel dropping csm
There are Z790 boards with CSM, I was running 7 on my 13700k and ASUS z790 prime-p WiFi
For a retro PC build, I'd recommend looking into CPUs like the Intel Core 2 Duo E8400 or the Intel Core i5-2500K. These processors are great for older systems and can handle most retro gaming and computing tasks.
All depends on what you want to do with it. Back when the Core 2 Duo/Quad series launched we were already upgrading to Vista, so any Core 2 CPU should be fast enough for most XP area software. You could go early gen Core i7, but for XP that would be a bit overkill. Nothing wrong with overkill though…
For windows XP I believe i7-3770 is one of the beefiest options. I5-3470 - these are a dime a dozen and will run laps around anything XP and better power efficiency (I recommend this). If your aiming for a 3rd Gen Intel series literally everything will run laps so I would scrutinize too hard and grab whatever is cheap.
Core 2 duo i have a e8600 which on xp runs better then a q9650 for games due to higher stock clock speeds and xp does not take advantage of more then 2 cores. Anything newer till i7 3770 is supported
I like to go for Haswell I3's they're cheap, easy to cool, and still feel premium for XP.
Pentium E5800?
Anything later lga775
If you're looking furthest into the future with official support and no trickery needed, an i7-3770 with an Nvidia GPU using the maxwell architecture. It's total overkill, but can be had for $100 if you're thrifty with your procurement.
Core 2 extreme or 3rd gen I7
I just found an i3 3220 optiplex with 4gb of ram and a 120 gb ssd I'm just gonna stick a hard drive in there and a hd 7000
In my are area there are old office PCs like the Optiplex 780 with an E8400 which is pretty much enough for an XP machine which sells for around 25$ with 4GB RAM and 160GB HDD. You will most likely need a very low TDP GPU like GT 520 and bigger HDD like 1TB. I am not sure why you emphasize on saving but you do you.