Hi everyone, today my new ASRock 970 Extreme4 motherboard will be delivered. Which means I can finally use multiple cards, is it true that the best way to do this is by using only the same 100's series of cards. Because at the moment I have a Sapphire R9 290, Sapphire HD6870(old one) and probably an Asus HD7950 tomorrow. Do you guys think it will give me any problems when I try to connect those three cards to my new motherboard?