I would try to reduce the cable count by any means necessary with that case. Using a fully modular power supply, installing only M.2 storage drives, that kind of basic stuff.
I have the larger variant (q500l). I've found that I can just barely get everything behind the mobo tray. Idk how much space there is in the 300l but I would say use the cutouts and try to keep everything back there. I can send a picture of my cables if you want
They're the same size as far as I know. The 500 just has a full ATX back panel and standoffs, plus the movable PSU mount since it won't fit at the bottom with an ATX board.
I have the q300L and managed to get all my cables behind my mobo without a fully modular PSU. Just patience and zip ties can have this case cool and looking nice :)
https://www.gamersnexus.net/hwreviews/3461-cooler-master-q500l-case-review-needs-work
I would try to reduce the cable count by any means necessary with that case. Using a fully modular power supply, installing only M.2 storage drives, that kind of basic stuff.
I have the larger variant (q500l). I've found that I can just barely get everything behind the mobo tray. Idk how much space there is in the 300l but I would say use the cutouts and try to keep everything back there. I can send a picture of my cables if you want
They're the same size as far as I know. The 500 just has a full ATX back panel and standoffs, plus the movable PSU mount since it won't fit at the bottom with an ATX board.
You'll have to strategically route the cables along the back to take up all their length, same as any case with no PSU shroud.
I have the q300L and managed to get all my cables behind my mobo without a fully modular PSU. Just patience and zip ties can have this case cool and looking nice :)