software to isolate and test psu?

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Bought a 750watt gold 80 5 years ago , over the 5 years i have run into a lot of system errors kernel 41 but ultimatley it didnt hinder operation 95% of the time and couldnt pin point it to the psu.
recently i have been getting black screen when running extensive programs like gaming sometimes it runs briefly then goes dark, i reseated the pcie slot and it worked for a time then dark.
i have run an occt stress test on all compoments . not getting any errors on the psu but the system shuts of before restarting during power test
The psu had a 3 year warranty so im skeptical

My main concern is wether the issue is with the gpu.

How can i test the psu to be 100% certain before investing in a 1000watt psu and it turning out to be an issue with the GPU
 
It's hard to be 100% sure it's the PSU without going to get PSU testing device or at least a power load device because you need to still be able to load the 12v rail if you are intending to isolate the PSU from your PC and you'd also want to check those voltages as a faulty PSU can be dropping under its operating voltage.

Your best bet without spending tons of money is to borrow a working PSU from a friend to test with - if that's not an option maybe a nearby PC store can do this test for you to o checking swapping the PSU will fix it, or just go ahead and buy a new PSU.

You could try to check other parts first by testing GPU, memory and CPU seperate and if none of those trigger errors and you're just having the PC shut down on gaming load then it's probably the PSU.
 
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Bought a 750watt gold 80 5 years ago , over the 5 years i have run into a lot of system errors kernel 41 but ultimatley it didnt hinder operation 95% of the time and couldnt pin point it to the psu.
recently i have been getting black screen when running extensive programs like gaming sometimes it runs briefly then goes dark, i reseated the pcie slot and it worked for a time then dark.
i have run an occt stress test on all compoments . not getting any errors on the psu but the system shuts of before restarting during power test
The psu had a 3 year warranty so im skeptical

My main concern is wether the issue is with the gpu.

How can i test the psu to be 100% certain before investing in a 1000watt psu and it turning out to be an issue with the GPU
No software can test the psu.

It could be anything on your pc that’s faulty.

Remove all the components and test the pc, add components back until you get the same issue.

Using a known good working part is the first thing that any tech support guy would do first but not everyone has a spare PSU lying around.
 
No software can test the psu.

It could be anything on your pc that’s faulty.

Remove all the components and test the pc, add components back until you get the same issue.

Using a known good working part is the first thing that any tech support guy would do first but not everyone has a spare PSU lying around.
The strange thing is i thought it was the psu or gpu because anytime i ran a game it would randomly go black screen, this happened very time a game was loaded. now for some reason the games work fine now with no black screen, any idea what components would be that unstable but still essentionally work its totally random, ive done an occt test whjich ran the power test and it always crashes, would a failing psu function in that manner that it powers the gpu and then doesnt i would have thought a failing psu the system would not start
 
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What make and model is the psu and what GPU is it powering. If a gold rated psu only has a 3 year warranty it must be a cheap one because most decent ones have had 5, 7 and 10 year warranties for quite some time now. It sounds like the PSU can't deliver enough power to the GPU when it power spikes. Things like this used to also happen if powering a high power gpu off a single daisy chained power connector. The only real way to check a PSU is with a multimeter.
 
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