Question Black screen under load

Jan 26, 2023
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Hello, straight to the point, while gaming or just stressing GPU, the screen turns black and I had to do hard reset.

Specs:
MB: Asrock Z97 Extreme 4
CPU: i7-4790k (I did not overclock)
PSU: NZXT C650
GPU: Asus GTX 970
RAM: Corsair Vengeance 2x8GB

Firstly it started happening while gaming and the PC would restart. I had old PSU (CoolerMaster RS-600) and I noticed also whining or hissing noise so I thought it will be the PSU. I got my hands on the NZXT one and after launching games or Furmark, the screen went black, no restart and no response.

What I tried:
  • No events in Event Viewer, only that the shutdown was unexpected
  • Running with 1 RAM
  • Different RAM
  • i5-4460 on the motherboard
  • Different PCIE slots
  • Plugging in the PCIE power
  • Reseating everything
  • Updating BIOS and drivers
  • Running everything outside the case
  • Using old ASUS B85M motherboard

    When I swapped everything to the B85M motherboard, there was no crash, no black screen.
    Although, I know that it is probably faulty motherboard, is there something else I could try?
    If not, is it okay to run i7-4790 on the B85M motherboard?
 

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