F3, f6, 68 random reboot

Hello, i recently built a new computer with the following components

i7 920
x58 SLI LE mobo
3x2g OCZ platinum
Xigmatek Dark Knight

The first time i booted up, it posted fine and installed windows 7 beautifully.

Then it kept restarting showing me the f3, f6, 68 boot codes

I have since replaced my mobo, same problem

I was able to run memtest for 2 passes, 0 errors

I've tried all 3 sticks in each of the grey sockets, no change

I've checked the CPU socket....no bent pins etc..

I'm thinking it may be something wrong with the CPU....it seems like the only option left

One thing that seemed to work for a while (worked for about 3 hours) was setting the VTT voltage to +225 (1.325v)

Are there any other BIOS settings i should watch out for?

ANY help is greatly appreciated!!

Yeah, i have been able to boot into windows from time to time
I've tried all 3 sticks of memory in all 3 grey slots, no difference.
I talked to EVGA tech support, and they told me it was probably a bad cpu, since i am able to use the computer for about 3 hours when i raise the VTT voltage high (around +225)

I have the same problem...

i have a x58 sli le
i7 920 cpu
Ocz 2gbx3 ram

and im having the same problem. I shipped out my motherboard to get it replaced and when i got it back it worked for 30 min then started to do the same problem. called up Evga they said its a bad cpu. I shipped out my cpu, and just got it back. I just installed it and its the same F3/F6 68 reboot problem. Im really pissed off. Now do i send out my mother board again? I ve been computerless for about 3 months lol.