I've gotten what I believe to be a workaround. If you disable EIST and C-State's in the BIOS the system seems to become stable. I can't say that this is actually a fix or a proper workarond. All I can say is that the PC's haven't so much as twitched since I changed those settings.
If anyone else runs into a similar issue can you try this and let me know if you get the same results as me.
Cheers,
TQ
I am having exactly the same issue.
I first noticed this issue when I used the default Intel driver install from the CD that came with the board. The problem was severe, the entire screen would flicker to black and come back. After a few times doing this, the system would reboot within 30 seconds of coming up. I know the memory is good, as I had used it on a prior system for some time and know it was stable (I upgraded that system to 8gb and took the 4gb and stuck it in this system immediately prior and that system, a Intel PW55B was perfectly fine)
I have installed the latest BIOS and video drivers with and it decreased the frequency of the reboots, from immediate every time within 30 seconds, to randomly every few minutes to an hour where the screen has a dark diagonal line about 1" wide goes across the whole screen left to right at a slight 20 degree angle.
This problem does not occur at all in SAFE mode at all, which tends to lead me to believe it is software related. Not one flicker or reboot while I am using the problem computer to type this.
Update:
Turning off the Intel Speedstep and C5 power state seems to have fixed the issue, though we give up the Speedstep capability of the processor for stability!
