There had been no problem--just updating bios to latest official release. What is xpd? I don't believe my memory is "XPD." The timing matches what is official for that memory, 9-9-9-24 at 1333 MHz (Mushkin part no. 994018). Looks like this new bios must do something different, but not sure what setting to change. Of course I'll try replacing that dimm but it seems suspicious it went bad only after the bios update.

memtest shows 60GB not 64GB. doesn't show stick by stick.
cpu-z shows only 61418 MB and even more oddly shows only 5 slots filled in spd, not 8:
http://valid.canardpc.com/show_oc.php?id=2333107

all the timings are the same, except for rtl/iol, where i get this:
(don't know what this means, but since the problem is dimm D1, I notice Channel D is the only one with the same timings for both sets of dimms)
chA: 37-5-35-3, 35-3-35-3
chB: 35-4-35-4, 35-5-35-5
chC: 37-6-35-4, 35-4-35-4
chD: 35-5-35-5, 35-5-35-5


btw, one very annoying side effect of using memok is that it deraids your intel system drive, so you have to rebuild it from scratch all over again. I recommend disconnecting sata raid before doing any bios updates, and then making sure you change from ahci to raid in the bios before connecting them again.
(also: why doesn't asus update the intel orom when they update the bios file--we're still at intel orom 3.0.0.1184, an old orom.)

HiVizMan wrote:
What was the reason for updating your bios? What I am asking is what problem were you trying to resolve?

Q1 What was your dram timing before and during the bios flash? Yes set the timing to the XPD of your kits.
Q2 It seems that you have lost one side of a double sided stick of ram.

When you did your memtest did you notice on one of the sticks of ram that it only showed 4GB?

ok, I moved the dimm from the d1 slot to the c1 slot, and the "abnormal" rating in the BIOS also moved from dimm_d1 to dimm_c1.
at least I know it's not the motherboard. It's odd a bios update alone would fail a dimm that was working fine before, but I'll rma that dimm and see what happens. even if I changed a setting in the bios to give that dimm some custom timing, I'd still have doubts about it.

p.s. it's a good thing there is that memok button.

techvslife wrote:
It's a real crisis: the world will soon run out of unused acronyms that begin with X.

haha 😛

Man that is so true. Guess that explains why Z is getting so popular.