yes, for the moment Im using three 6790s on this rig but i will connect one 6870x2 and four 6790s on this motherboard and PSU once I get extenders for PCIEx1 slots
i get performance loss when i use pcie2 4x
i am sure you will have performance loss on 1 x
but it doesnt hurt to try. tell me if it works okay?
I thought pci speed did not matter for bitcoin.... that you could use a 1x and it would be the same.. ?