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      |
+-----------------------------------------------------------------------------+