Hi all, I'm looking at this motherboard for my build: ASRock P67 Extreme4 Gen3 I read online that PCI-E 2.0 cards should work. But I also wanna make sure that SLI will work with 2.0 cards, or if any other problems can come from using 2.0 cards. If anyone knows or has experience with this board, or any other board with PCI-E 3.0, I'd appreciate some help. This board looks great and is at the perfect price for me, and this is the only thing really holding me back from getting it. Thanks!