New GPU, Frequent Crashes

[Dezz3]

previously had an rx580 (4GB VRAM) and I recently purchased an rx580 (8GB VRAM) and when I play games the frame rate is extremely choppy and after a few minutes it shuts down my pc (Temperatures are normal though). The CPU I have is a ryzen i7 1700 Eight-core processor. I don't know how to fix it, I'm pretty sure I have to upgrade my CPU but I don't know which one will solve the problem. Does anyone know what I can do to fix it?

[Perrin]

Have you installed all the drivers for your new GPU? Also you probably don't need a new CPU, but the Ryzen 5 3600 is a solid choice right now and rather inexpensive.

[Dezz3]

I'm pretty sure I did install the new drivers, if I only needed to install one then yes I did.

[Kyatto]

Do a fresh install or remove all video drivers with DDU before reinstalling, i had (kinda still have) the same issue with an RX590, the framerate is fine, solid 60fps but then it freezes and either crashes completely or just for a minute or so like it turns itself off and messes with iCue, not even high temps, barely even touching 80°C but the fans start spinning like mofos and it crashes, my solution was to underclock it just above an RX580 and pull the power limit to -10, also it kinda depends on what i play and on which settings, for instance, Hellblade Senua's sacrifice wouldn't run over 5 min without crashing no matter the quality settings, hope this helps you.