Question Weird behaviour and crashes during gaming on RX 5700 XT

Oct 5, 2020
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While gaming, my PC has been experiencing slight problems, such as Task Manager reporting GPU usage at 100% for a split second, spike-shaped texture corruptions that later crash the game, and even the whole computer suddenly turning off completely. Also, immediately after startup, you can hear the GPU buzz every time I scroll up or down a webpage. This goes away after a few minutes

I believe it could be the power supply, as I got a PowerSpec 750W Gold unit from Micro Center. For referene, the rest of my build:
Ryzen 5 3600
ASUS Tuf X570-Plus Wifi
2x8gb gskill trident z 3200 c16
Gigabyte Windforce RX 5700 XT

I have no physical equipment to test my power supply, nor a reliable 750w+ backup. Any help?
 
Oct 5, 2020
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I bought my PSU about 2-3 months ago. I use the one cable to fill the 8 and 6 pin, I read that was OK online but if it isn't I'll use 2 separate cables. Using Radeon Adrenalin 20.9.1, latest version.
The only other GPU I have is a GTX 745, no 6 pin or anything. I used it for a couple days no problem while I waited for my 5700 XT to arrive.
 

Pickachu

Prominent
Apr 15, 2019
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I bought my PSU about 2-3 months ago. I use the one cable to fill the 8 and 6 pin, I read that was OK online but if it isn't I'll use 2 separate cables. Using Radeon Adrenalin 20.9.1, latest version.
The only other GPU I have is a GTX 745, no 6 pin or anything. I used it for a couple days no problem while I waited for my 5700 XT to arrive.
Try with 2 separate cables and reply here whats going on with it.
 
Oct 5, 2020
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Okay, I used 2 separate cables for my GPU, but the problem has worsened. Not 2 hours after booting it up and running the OCCT psu stress test, I got a BSOD with an error about attempting to write to read-only memory. After running chkdsk and Windows Memory Diagnostic with no problems, I tried to play CSGO. The computer shut itself off after 5 minutes of gameplay, with no warning. The graphics card was relatively cool to the touch.

I've been looking at buying a Seasonic 850W to replace my Powerspec 750W power supply, could that be the fix? Or is there something wrong with my graphics card?