Several problems can arise when multiple GPUs are installed on a Windows system. Rebooting to find all GPUs disabled is the most common problem. You may find you can enable only several of your GPUs before they are all disabled again. The most common fix for this is to increase the size of the virtual memory or “page file”. Setting your initial page file size to 16384MB or more is the most common solution.
Increase Page File Size
- From “Control Panel” select “System”
- On the left of the window select “Advanced System Settings”
- “Advanced” tab
- “Performance” button (you can optionally disabled performance effects at this step)
- “Advanced” tab of “Performance Options”
- Under “Virtual memory” click the “Change” button
- Deselect “Automatically manage paging file size for all drives”
- Select the “custom size” radio button
- For “Initial Page File Size” enter 16384MB (some people recommend more for theoretical performance gains in NiceHash Miner but 16384MB should be enough to re-enable all the GPUs)
- Repeat 16384MB for “Maximum Page File Size”
- Click the “Set” button and reboot
If the problem persists after reboot you may need to update the BIOS of your motherboard or do a number of other things. 9 out of 10 times the page file increase solves the problem of disabled GPUs with no further action necessary.