I'm running a 4090 with drivers 527.56 on Windows 11 21H2 and using a Valve Index kit, and I'm still getting stuttering when MSI Afterburner is open and monitoring hardware. Upon closing the program out completely, all pink lines in the SteamVR performance graph and stuttering disappear. I thought this was fixed by Nvidia a year or two ago but it seems to not be the case. The funny thing is, my 1080 Ti does not have this problem with MSI Afterburner and SteamVR. I can run both at the same time with no display errors and stuttering. It really seems to be a newer Nvidia series issue. Anyone out there running a 40 series card with MSI Afterburner actively monitoring hardware stats and playing VR without any issues?