I've been using this mobo (Bios ver. FH) with 12gb (3x4gb PV73112GB2000ELK) at 1066 for six years without any problems. I bought a new set of 12gb (same ones as previous) and after installing them I realize that in the Bios all of them are installed but only 4 slots are enabled, and Windows says the same thing, that I have 24gb installed but only 16gb are available. All of the new memories seems to work properly because I change the order in the slots and always get the same result, total of 16gb enabled, and 24gb installed.
What I could be doing wrong? Any Ideas?