Looks like a stock atx psu.
Measure your old psu...LxWxH.....and verify the new psu will fit.
What psu are you looking at?
Post a link.
So I have an old machine (Dell T3400) and the original factory power supply just died. I figured there was no sense in fixing it so I was going to get a new one. I checked the manufacturers spreadsheet and it says that a 525 watt PSU is available. Now the power supply that I have in my scope is 500 watts. So my question is, do I need 525 watts exactly or will 500 work? I really don't want to brick the system. I also apologize in advance if there is a thread already about this...