I recently built what I thought would be a cutting-edge gaming rig (EVGA 680i LT w/SLI, Core2 Duo E6850, 4 GB RAM, 2 x EVGA 8800 GTX 768 MB, 500 GB HD, Vista Home Premium), but I've been having troubles getting any newer game such as Crysis or UT3 to run smoothly at any resolution/AA setting...