Description of Problem: Frame drops ~3FPS every second, happens in any game, and sort of noticeable on the Windows desktop also when shaking the mouse around really fast. Causes noticeable stuttering, almost like a "heartbeat" effect because it stutters one time per second.
Here's an example from DOOM Eternal's FPS counter
UserBenchmark: https://www.userbenchmark.com/UserRun/37531135
DDU: Tried it, no dice. Thought it would do the trick since I had an EVGA 1070 SC in here before. Although, it reverted to a low resolution, and the heartbeat effect seemed to have stopped.
Computer Type: Custom built
GPU: MSI Ventus 3x RTX 3080, running at 2x 1080p @ 60Hz (one is a 42" TV, one is a 22" monitor)
CPU: Ryzen 5800x
Motherboard: Aorus x570 Elite (F31Q Bios)
RAM: XMP on, G.Skill Trident Z Neo Series 16GB (2 x 8GB) PC4-28800 DDR4 3600MHz CL16-19-19-39 1.35V F4-3600C16D-16GTZNC
PSU: 850W Corsair RM850x
Operating System & Version: Windows 10 Pro v20H2
GPU Drivers: v460.89 (Released 12/15/2020, latest available). Tried rolling back to v460v.79 but the same issue occurs.
Troubleshooting:
答案1
Of all things - it was the HDMI cable going to my TV! For some reason my 3080 didn't like it, even though my 1070 had no problem with the same cables/displays. I swapped out my HDMI cable for a different one, and my frames at back at a consistent 60 FPS.