Question How can you test to see if a PSU has definitively gone bad?

[80251]

I have a 13 year old Rosewill Capstone 750 Watt 80 Plus Gold that turned out to be the whole reason I had unstable overclocks w/my 9700k (@ 5.2Ghz.). The thing is, according to HWiNFO64 and my DMM, all voltages are always within the 5% margins specified by the latest ATX standard and usually higher than the referent voltage. On swapping PSUs though all the problems w/my present overclock disappeared. I'm guessing the ripple voltage must have been really bad under load, but I guess there's no way to test for this without an oscilloscope.

 

[steveb1976]

there are devices out to test "psu, and its cables" check amazon and ebay... they are cheap to buy and hand to have.

 

[Syntaximus]

There's always the paperclip method, but using a multi-meter is better.
Lots of guides out there (all similar for the basics), here is one is from Microcenter.

 

[steveb1976]

https://www.passmark.com/products/i...supply voltages are,and current for each rail.