Hynix RAM - problem solved.
OK, when I first got my board, before I got my BH6, I was running some OCZ 3700 Gold rev 3, with hynix chips, at 250htt. Its been out for a while, but I put it back in for some testing. Switched back to 3.3v for vdimm, cleared cmos in the normal way, loaded default settings, and couldn't get above 210htt! WTF! Tried rolling back to older bios version, no go. Started up A64tweaker, and noticed Max Async Lat was set to 5ns (auto in bios). Set it to 7ns and I'm able to get to 260htt 1T! :toast:
This brings me on to a problem I have... What is limiting my RAM O/C? Both sets of ram (BH6 and hynix) reach 260 1:1. Neither will do 262. I had the hynix at 270 2T on an Asus SLI board, so would expect the same on this board, but nope, makes no difference set to 262, and reboot.
Memory controller?