I've seen something like that two times, but not on my P9X79WS. The first was on some LGA1366 boards with uneven CPU mounting pressure causing some of the memory channels to not make connection (resolved with the two-lever system on LGA2011). The second was a very bizarre SMBus interaction with one of my RAID cards--also on an X58 board.
Running two sticks per channel is harder to drive. Are all 6 sticks 1.5v memory, or are some of them DDR3L at 1.35v? Are you overclocking at all (my recollection is that you do not, but driving two DIMMs per channel becomes harder when overclocking). Have you undervolted any of the processor's rails? I also recently updated to 4404 firmware, but haven't seen any ill effects. I only run 4x8GB DIMMs at 2133 CL9 though....I couldn't get the speed I wanted when trying to run 8x4GB. -----Original Message----- From: hardware-boun...@lists.hardwaregroup.com [mailto:hardware-boun...@lists.hardwaregroup.com] On Behalf Of Winterlight Sent: Wednesday, January 8, 2014 10:38 PM To: hardware@hardwaregroup.com Subject: [H] Greg >>>P9X79WS Greg...My board started out with 4 x 8 =32GB Crucial Ballistix 8GB DDR3- 1866 CL10 of which Crucial guarantees compatibility with the P9X79WS Last week there was a very good sale on these on Amazon Prime so I bought two more DIMMS for a total of six = 48 GB. I want to run a huge RAM drive. I have installed them in the exact slots as recommended in the Asus manual. The board is running the latest October 10th 2013, 4040 firmware. I see all six DIMMS installed and recognized in the BIOS... but the BIOS only totals up 40 of the 48GB. Windows, likewise, sees only 40GB. I will contact ASUS about this but you don't have any thoughts on why I am missing the 8GB...do you? w
