Chosen Solution
Defective PSU for ITX Gigabyte motherboard GA M61PME S2P, and I aim to replace with ATX PSU; first of course, by transferring the motherboard to an ATX case. I hope for help regarding compatibility issues. Thanks.
As long as there are enough watts in the power supply, you have a case that can fit an ATX power supply, and you have the right CPU header (4 or 8 pin) you should be good… The only thing I think you may have a problem with is not all ATX power supplys have 4 pin CPU power and that motherboard has a 4 pin CPU header…