huh?

you are unstable becasue the memory is not DDR3 1800

you cant run 4GHz on a locked 9x multiplier proc without running 450FSB and that requires memory specific for that purpose @ 2:1

If you wish to RMA that board in thinking that Mushkin memory is not the problem then be my guest but I think you are going to find out the same thing OCZ people discovered in that the memory chips are the problem, not the board

I shot another email off to Asus. Why I have not heard back at this point I do not know but I sent a follow up. If I dont hear back on the GTL issue I will post some skew values to try. My concern is they are using a multiplier instead of a formula for that GTL value and simply displaying the BIOS setting as mv. I have seen them do some strange things over the years and I would prefer confirmation instead of a guess... educated guess or not.

Those are the sticks

I just got an automated email response from Asus.. my contact at Asus is on vacation. I thought something was strange as I usually hear back from him within at least a week

I will post some numbers in the next few days but I would not get my hopes up

The problem is the memory no doubt in my mind about that. The result of your tests prove that. The instability is noise between the chips and the NB+CPU which is what skew and GTL trys to compensate for