This is the missus pc; I was browsing the internet this morning when I had a BSOD, rebooted and since then the multiplier is stuck at 6x. I was using this settings when the BSOD happened: 375x9 = 3375mhz (stock voltage, stock heatsink), ram at 900mhz. This was my first pc, I built it three years ago so I'm familiar with it. C1E was enabled but EVEN WHEN DISABLED it doesn't make a difference. The board is a GA-P31-DS3L with 2Gb of Corsair memory and Antec Signature 650w. I loaded optimized default and cleared the CMOS but still the multiplier is stuck at 6x (2000mhz); the voltage seems to be stuck at 1.10v too. I run the cpu test in 3DMARK11, prime95, OCCT ... the cpu is always running at 2000mhz; Any ideas? Did you experience this? Thanks in advance.