grrrr, I feel so silly asking so many questions but...
I looked up my power supply and I seem to be getting different dimensions wherever I go, HP says that the dimensions are 6in x 5in x 3.25in (they don't say for specifically my PSU, but for most) then others say 5.9 x 5 x 3.4 etc. etc.
How can I buy a new PSU that doesn't exactly match the measurements of mine? I'm 99% sure it's an ATX supply, but all the dimensions I find for replacements vary. If you want to look it up, I'm using an HP Media Center m7760n. The power supply is a replacement, but I didn't replace it. I had to have someone replace it with a similar part because the first one broke. (So I'm assuming they're the same dimensionally)