On such old cards I think this is the new normal.
Be sure to remove all video drivers as you install your new GPU. Then with those gone install the video driver supplied by the GPU maker from their web site. The supplied CD is usually too old.
I see I forgot to tell what driver remover tool I use. Google about DDU. It's what I use.
Hello. Few months ago my PC started to randomly freeze. I was searching for solution but didn't find any. Then my PC started to randomly restart. So I looked into my case and cleaned dust, then i reinstalled windows and UEFI. Then I tried to play some games but after about 10 seconds it crashed with DXGI_ERROR_DEVICE_REMOVED and my PC was still randomly freezing and sometimes I got a BSOD with VIDEO_SCHEDULER_INTERNAL_ERROR. So I tried GeForce GT 7800 and it was working fine, so I thought my GTX 660 is broken and I bought a new one, but after replacing my old GTX 660 with new one I have the same problems.

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