Also, Increase your Virtual Ram By following these steps.
1) Right click "This Pc" or My Computer
2) Click "Advanced System Settings" in the left tab.
3) Goto "Advanced"
4) In the "Performance" section click "Settings".
5) Goto "Advanced" and Click "Change" in the virtual Memory Section.
6) Uncheck "Automatically manage paging file size for all devices".
7) Select a drive with enough space.
7) Then click on "Custom Size"
8 ) Set the "Initial Size" to this formula.
(Amount of VRAM each card has * Number of cards) + Amount of Ram your pc has.
e.g for 5 x 8GB cards and 16 GB ram.
(8192 MB * 5) + 16384 = 57344 MB
You should set whatever the value you get in both "Initial Size" and "Maximum Size".
Click "Set" then "Ok", Click "Apply" and Click "Ok" again. Afterwards, it will ask you to restart your system. Restart your system and it should resolve your issue.
Also, tell me this. When your system is booting up. Are the fans of your GPUs spinning? And do they all stop spinning when the window is finally booted up?
#awesome - thank you for this. First, your formula for virtual memory is great. I was just running 16 which was way low for an 8 card rig. Second, when I started started the nicehash software, all the boxes were checked. Started mining and the boxes "disappear". Stopped mining and all but one of the boxes was UNCHECKED!! Re-checked them all and I am mining on all cards!
Thanks again for the awesome guidance!
Awesome, happy mining