I also had this kind of problem and it's still a lill laggy, but now it's okay.
- Restart your PC
- Kill all services/tasks that are using the GPU (listed by nvidia-smi)
- Get your preffered program in the foreground -> the explorer (desktop, menu etc.) is more laggy than chrome
- lower global / local work till it's not laggy anymore
cheers
C:\Program Files\NVIDIA Corporation\NVSMI>nvidia-smi
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 7896 C ...\ethereum\claymore-dual\EthDcrMiner64.exe N/A |
| 1 1188 C+G Insufficient Permissions N/A |
| 1 4444 C+G C:\Windows\explorer.exe N/A |
| 1 5200 C+G ...ost_cw5n1h2txyewy\ShellExperienceHost.exe N/A |
| 1 6092 C+G ...indows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A |
| 1 8744 C+G ...x86)\Google\Chrome\Application\chrome.exe N/A |
| 1 9832 C+G ...\ImmersiveControlPanel\SystemSettings.exe N/A |
+-----------------------------------------------------------------------------+