I Have now the same Problem after I reinstall my Win 7 64 Ultimate on my new Corsair SSD.
Sys:
CPU: Intel Core i5 3570k (no oc )
RAM: 2x8GB Corsair Vengeance DDR3 CL10 1600mhz (Use 22gb as ramdisk)
GPU: Asus HD7870 DC II 2gb v2(dead because HW malfunction)/ Intel HD 4000
MB: Asus P8 Z77-V LE (Asus bios 0705 <- really annoying bios version where you cant push any buttons except del)
Sound: Asus Xonar D1 (UNi Xonar 1807 v1.62 beta 1)
SSD: 1x Corsair Force GT 120gb
HDD: 1x WD Raptor 150gb, 1x Samsung Spinpoint 500gb, 1x Seagate Barracuda 1tb
OS: Win 7 64bit Ultimate
PSU: enough power for any type of 4 freaking gpus