PC randomly shuts off/blacks out

[zeezy]

Now for this issue I will essentially be gaming and suddenly all power is lost to my PC. No blue screen or error, it's almost like a mini power outage happens.

 

I've been troubleshooting many issues over the past few months as startup times were suddenly horrid, frame rate was bad, and things started slowing down. I have slowly solved all these issues until this new issue where the PC dies essentially. Here are the following things that I've replaced since these issues have begun in order.

 

Hard Drive(with new Windows download)

SATA Cables

Motherboard

Purchased 16 gb more RAM (Now at 32gb and matched up with same 2 sticks as before)

PSU

 

I've ran tests on the CPU, GPU, RAM, PSU and all were completely fine. Initially I could get the computer to shut off in a couple minutes of a stress test and verified the PSU was the issue. Since I've replaced it I cannot get it to shut down with this stress test, but it is obviously still happening while gaming.

 

Temperature stays fine and all fans are working properly, essentially the only things I know that I haven't tried yet is reinstalling my Motherboard to see if I set it in slightly wrong, and replacing my CPU and GPU. Any help on this would be greatly appreciated, I would be happy to provide any more information on the troubleshooting I've done and specs.

 

PC Specs: 

OS - Win 10

CPU - AMD Ryzen 5 3600

GPU - Zotac Gaming NVIDIA GTX 1660

Motherboard - ASUS ROG STRIX B450-F II

Memory - 4 x 8gb Corsair DDR4 3200mhz

Storage - WD Blue SATA 500gb; SK Hynix Gold P31 1tb M.2

PSU - 600W Gold Certified Non Modular (unsure of brand)

 

Troubleshooting Softrware used:

OCCT for PSU

WhySoSLow for overall system check

Task Manager for CPU efficiency

ASUS BIOS for System Temperature info

Memtest for RAM

 

 

 

[Estiar]

Don't like the "Unsure of Brand" part of the PSU. It still could be the PSU being bad under sustained loads. Could also be something screwed up in the Motherboard, I've seen that too.