Remember 8800 GTS 640 got 5.9 on Vista and GTX 480 got 7.9 on Win 7 -> High-end videocard should get max at WEI because new OS is same time to or 7 months newer than new high-end videocard. GTX 670 gets 9.9 on Win 8 -> still no real until Microsoft or NVIDIA will fix performance issue.