Just bought a EVGA GTX670FTW, but it wont work in my system, system freezes at beginning of POST. So far I have rebuilt my system from scratch & reinstalled the OS. But still no luck.Works fine with GTX460SLI. Sent the GTX670FTW back to scan, who tested it & found no fault(offered me a refund). Has anyone else here tried using a GTX670 with an ASUS M3NHT Deluxe. NB: Using latest bios(3401).