My Pc keeps crashing when I rise the graphics to Ultra or in heavy load. HELP!!

Sep 29, 2018
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Hi, Lately my PC is crashing every time I put BF1 on Ultra preset, playing on medium or sometimes in high it not crash, but I think my PC is capable of handle this game on Ultra easily, also BO3 crash randomly on ultra and high. This crashes only happens when i play games on Ultra.

- I made a clean installation of drivers with DDU so many times.
- Clean install of windows.
- check temps and everything is normal (GPU- below 65, CPU below 60)
- Installed the games on my SSD apart of the HDD and same error.
- Benchmarks with aida64 and everything was fine.

I tried almost everything I have found but nothing has worked. I think is the PSU but is a excellent brand and 520w is sufficient for my build I think. Also I notice in BF1 with afterburner that when my GPU memory is above 3000mb is when the crashes occur, the 3.5 vram of my 970 are not holding the game? or is faulty?

This is my build:
Ryzen 1600
Asrock ab350m pro 4
Gtx 970
Corsair 2x4 8gb 3000mhz (Running on 2133mhz because my mobo don't want to run the XMP)
PSU- Seasonic M12ii 520w bronze

What can be the issue, the PSU? Faulty RAM? or anything else?