Hey I just recently got an MSI X58 Pro for 90.00, I just threw some 5750s in there for now and I was wondering third PCI-E slot runs at 4x would that be worth throwing another card in there ? Cards laying around: 2 Sapphire 4850s, 1- 9500 GT , 1 - 8600 GTS tried to go with Physx but its disabled. 5750s will be in until work picks up again middle of January hopefully. Also picked up an AMD system which I never owned before. ll x 4 965 and a GA ud5 790 but for now I'm just waiting for CPU coolers to come in for both, systems have stock cpu fans now and dont want to OC either with them on.