After reading many sites including this one on GPU mining gremlins, one additional thing to try especially when changing the GPU card configuration:
1) Go to device manager.
2) Select and view display adapter list.
3) Go to view and select "Show hidden devices"
I delete any additional driver showing as hidden.
Doing this makes reinstalling drivers easier and I have found that driver crashes are reduced. I believe this especially important in mixed card configurations.
This has always been a windows issue. Those of you who use USB or RS232 devices know that windows sets up a new driver anytime a RS232 or USB device is installed in a new port.
BR
Topic: Stealth MSWindows GPU issue (Read 490 times)
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