PSU killing components?

[grss1982]

Hi everyone! Been a while!

So I have a CM MWE 750 Bronze - V2 PSU powering the following:

Ryzen 5 3400G
Gigabyte B450 Auorus Motherboard
32GB DDR4-3600 (2x16)
ASUS TUF 1660 TI 6GB DDR6
1TB NVME

This was purchased by a friend about 3 years ago for her kid and now it showing signs of instability. The PC had this problem of the screen becoming garbled after it was booted up and idling in Windows. It also sometimes gets a BSOD. So I did some stress test by starting with Prime 95 and noticed that the torture test just fails and stops immediately. Thinking this was a processor-related issue I replaced said processor with a spare Ryzen 5 2600 I had lying around and instability went away.

Two weeks pass by and all was well but then 1660 is now having issues. Did some basic tests and narrowed it down to the video card going into a black screen after 7 minutes or more while idling in Windows or on the BIOS screen. I turn it off and let it cool off for 10 minutes and turn it back on again and the same black screen problem occurs after 7 minutes or more. Already had the thermal pads and paste replaced but the same black screen issue comes up. So I replaced the video card a spare I had and all seem to be working well.

However, I'm starting to think that the CM PSU is killing components and I'm not sure I want to continue using it. Should I replace it at this point? Or are there other tests I need to do with he PSU in order to be sure that it is not the one killing components? Maybe even open it up and do a visual check?

Thanks in advance for any insights into this.

[stj]

you could open the psu and post pics of it,
but unless caps are blatantly domed you really need to scope it.

or use a different psu and see if the issues go away.
also make sure it's all clean - these newer boards with tiny parts are more sensitive to dust building up on them.

is the psu under warranty? if it is then dont open it - try a different psu and if everything is good then get it exchanged.
my Seasonic psu's have a 10year warranty on them

[CapLeaker]

This doesn’t make much sense to me. Usually power supplies behave better once they are running and warm up.
boot up Linux from a stick and test from there see if any behaviour changes.