Your Intel RST driver looks ok.
Follow the instructions on this link.
Try the suggestions if you haven't already. STOP 0x116: VIDEO_TDR_ERROR troubleshooting(also for STOP 0x117 errors
Since you have tried other nVidia drivers, and the AMD card crashed in your system, there is a chance it is the PSU.
The FPS dropping like that can be a power fluctuation, not seated correctly, faulty card. You have ruled out the last two already.
There are other possibilities but the PSU is most likely.
STOP 0x00000116: VIDEO_TDR_ERROR
Usual causes: Video driver, overheating, bad video card, ?BIOS, ?Power to card
Probably caused by : nvlddmkm.sys ( nvlddmkm+993b10 )
Attempt to reset the display driver and recover from timeout failed.