rx 570 armor oc 4gb instability at stock speeds

[vojvi]

my pc started randomly crashing to a colored screen requiring a manual restart of the computer. The issue was fixed by underclocking vram from 1750Mhz to 1500Mhz. If i run mem test(it returns no errors) or if i transcode video or use screen capture i get weird graphical glitches on screen. I suspect this might be failing vram, maybe gpu vrms?

I also tried reinstalling drivers and reflashing bios. Temps are below 70˘C. Another issue might be my old and crappy 600w psu but i doubt it, or my crappy motherboard which only has 2 vrms.

I will maybe attempt a repair in the future if it only requires a vram chip replacement. Any ideas as to what it might be?