had to back my memory off to 850Mhz 4-4-4-12 1T. My previous setting of 970Mhz 4-4-4-12 1T wasn't stable after an extended test. I tried all the way up to 2.25v and I didn't want to go past that. DDR2-1020 5-5-5-15 2T wasn't stable at 2.25v either.

So I'll stick with DDR2-850 4-4-4-12 1T 2.1v. I have 4x 1GB so maybe that's a factor.