From my mining days if I remember correctly.. u need to set the virtual memory in windows more than 20gb if you plan on using more than 4 gpu's or something like that.
its been awhile.. so the numbers might have changed but u get the jist right? set the virtual memory in windows to 4-5-6x of whatever it's set right now in windows.
I'm actually using Ubuntu. For machine learning purposes.
I got a pcie extension cable from a fellow member and the system seems to be working fine now, except for crashes after 6 hours of system being turned on. So yeah I'm still debugging that.