GA-X79-UP4: Half of RAM Capacity Detected

[etavares]

Hi,

I'm using CORSAIR Dominator Platinum  DDR3 2133 RAM (CMD16GX3M4A2133C9)  I have 4x4GB sticks.

I've tried using XMP Profile 1 and Optimized Defaults, but I consistently get 8GB reporting in BIOS when I have 16GB of RAM in the MOBO.

I did some diagnostic testing:

• I tested 8GB in slots 1 and 3 and then in slots 2 and 4.  It read 8GB.  All slots seem to work.
• I tested 8GB of sticks 1 and 2 in slots 1 and 3; then tested stick 3 and 4 instead.  Both read 8GB.  The RAM appears to work.

This also occurred with G.SKILL RipjawZ 2133 RAM...4x4GB of 2133.  Same issue.  I did have to adjust the DRAM voltage to 1.65V for that test.

My BIOS version is F2.

Any ideas?

-etavares

[kinematic]

i am having same problem
installed 32 GB of ram, MIT reports 32 GB, but system info reports 16 gb as does windows
board is GA-X79-UP4 rev 1.1 bios version F5
memory 4x8gb corsair ddr3 1600 vengeance pro

have you resolved this problem?

[dmdilks]

Try and update the bios and I'll do some testing on my board I'm running F3t. I do have some 8gb sticks. I have been running just 8 4gb sticks.

[etavares]

I had one bent CPU pin. Fixing it resolved the issue.