I suspect that I have a bad mother board. I double check the specs on the board and it supports up to 16gb at 1600 mhz. I took the ram that was working in slot b and plugged it in slot A. I turned on my computer and got nothing. So I am only running on 8gb in slot b. Would I need more to run on windows 10? I plan on running 6 gpu's. When I plug in a gpu to the 16x pci slot on the mother board it can be detected. When I unplug it and use powered usb riser, I get nothing. I am also not getting anything when I use the powered usb riser to plug in my other gpu's. How do you get windows 10 to detect the other gpus? I have plugged in both the 6+2 pin and the 6 pin on back of my 390's and into the power source? Maybe it is a rail issue? would you have any advice on that? My psu is a 80+ Gold 1300w EVGA PSU. Please help. I really really appreciate it. Thank you.