I need some suggestions on cards to get. I will be building some rack machines and I only have about $2300 or so to spend on GPUs (have already bought PSUs, motherboard, risers, HDD, CPU), also still need to get a case but that doesn't factor into the $2300. What would you suggest?
A. 5x Sapphire R9 280X Dual-X
B. 4x AMD R9 290 now and 1 more later
Which would you do? I will be running dual 800W PSUs and cooling will not be a problem, the case comes with mounts for a 20in box fan.