Status: UNRESOLVED

Computer Type: Custom built Desktop

GPU: 2 x Asus Strix 1080ti

CPU: Intel 9900k - no overclock

Motherboard: Asus Maximus Hero X motherboard

RAM: GSKILL 32GB kit (4 x 8GB) at 3200mhz (XMP enabled)

PSU: Corsair HX1200i

Operating System & Version: windows 10 (recent install)

GPU Drivers: 417.35 clean install

Description of Problem: after upgrading motherboard + CPU, All games seem to have extremely low frame rate (going from 144 average in destiny 2, to 15fps ) This problem is present across games in different launchers and different ages. Note: GPU usage of one GPU spikes to 100% constistently when a game is launched.

Troubleshooting:

I've reseated both GPUs, Disabled SLI, Disabled Gsync, Enabled one or the other. I've uninstalled drivers via DDU, I've tried going back to a known stable build, I've checked temperatures and usage in HW monitor and task manager. I've removed the SLI bridge and tried to run on just one card. no change.