PC monitor whites out during gaming.

May 19, 2018
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Cpu: Ryzen 5 1600
Gpu: R9 290x
Mobo: Asrock killer x370 sli/a.c.
Ram: 4x 4gb crucial ballistix it
Psu: corsair rm550x

Here is the issue. I was playing some rainbow 6 seige with no problems. However, 20 minutes into the game, my monitor goes white and my keyboard and mouse is powered off. Audio is still running though. Pc becomes unresponsive, but it is still running . I had to force shutdown the rig. Upon reboot, the monitor receives no signal. After about a few times of rebooting attempts, it finally turns on. Running a game seems to trigger the problem again.

Gpu and cpu temperature are both below 50 celsius. Ram sticks are properly working.

It is a motherboard problem or a psu problem. How should I check?
 
Solution
look in windows error log if there code 41 that power. download hardware info set it to logging and sensor watch your 12v rail. in the bios make sure the 12v rail is at 12v.