Can iIuse an RX 580 and R9 380 together in the same PC? I use win 7 with an i5 6500 and RX 580. I am not very knowledgeable about crossfire. I found an R9 380 the other day and thought it wouldn't hurt if I could use it to boost performance slightly. If it does work, could anyone tell me the advantages/disadvantages and how I would set it up?