And I realize that it's triple channel, so I've got 3 of the 2GB sticks in every other slot, then the other 3 in the other 3 slots. I don't think it's a seating issue, because CPU-Z consistently recognizes the full 12GBs. If one or more of the sticks weren't seated, I imagine CPU-Z wouldn't see it.
yes you're running it at triple channel mode, given that you populated all the 6 slots with six identical(volumes/running speeds etc..) modules. so there's no room for mistakes for proper RAM slots population for now.
we meant re-seat; pull out all those modules then re-insert on it's slots firmly. worth a try.
flashing the BIOS fixed it for some(if you haven't tried it tho), lastly... idk if you heard about the X58 boards gone hay wired with it's RAM volume detections due to 'overtightened' CPU coolers. you may check that also.
Edited by sword_fish, 26 October 2012 - 09:20 PM.