Need advice! My rig is equipped with 2 Radeon 7990 and one r9 280, total 1450 sols/s. Very pleased! My aim is to mine enough coins to buy newer gpus that Are more power efficent without losing speed. Any suggestions? My mobo can handle 3 gpus max.
My current setup is nearly same as yours. I have one r9 270 and three r9280x gpus.
I'm thinking of selling them and buy Nvidia gtx 1070. GTX 1070 is most power efficient for now.