I built a pc for a friend around two months ago.
The specs:
P5q Se PLUS
Xeon E5450
8 GB DDR2
RX 470
Cooler Master MWE 550
So, he was able to use it for around two weeks before the pc started to go black screen randomly (even without GPU load).
There was no artifacts, lines or anything that shows sign of a broken GPU.
Sometimes, if he waits for a few days, he will be able to play again for hours without any problem. Sometimes the pc won't even complete post. The diagnostic beep or lights will tell that somethings wrong with the GPU.
What I had done:
1. Replaced RAM, still the same
2. Checked cables, good condition
3. Tried another motherboard, same no post at boot.
Could it be a faulty PSU?
Just found out that the Powerdevil RX470 in this pc was used for mining for over 2 years+.