PC keeps restarting- PSU or GPU Problem

[Rumman]

Hi, I am facing some critical problems with my PC. It keeps restarting randomly. I am not certain about the problem which parts causing. Initially thought about the PSU, as the PC abruptly restarted, then I shifted my concern over the mobo as I did BIOS update a few times previously. Also, my parts (Mobo, CPU) are old, around 4 yrs. Then I think about the SSD, but installing Windows to another SSD doesn't solve the problem. In the meantime, I notice some glitches while I am in the BIOS. I don't find any problems during my gaming time. Even during heavy Gaming, my PC never crushes. So, in the suspect list, GPU was at the bottom. 

 

But today, when I replaced the GPU with another one, till now, I didn't face any restart problem for 5 hours.

 

Now should I try to update the VBIOS of the GPU?

 

[--SID--]

What are the full system specs includes the brand and model of the PSU?

[Rumman]

3 minutes ago, --SID-- said:

What are the full system specs includes the brand and model of the PSU?

Mobo: B450M S2H

CPU: 3600x
32Gm RAM (2 sticks at 3200Mhz EMP)
SSD: 1. Samsung Evo 970,  2. Team 256 SATA SSD

GPU: RX 6800
HDD: 3 HHD (1 TB, 2 TB, 4 TB)
PSU: Corsair TX 650M

[mk2000]

in=t can be an issue with your cpu or gpu, could ou try to download a driver update if there is one new? or roll back your gpu driver?