Originally Posted by ivanlabrie
How odd belial...try more vdimm.
Have you tried booting and running memtest86+ with xmp?
If they can't run that without errors they are defective and you can rma or get a refund.
I don't need to run memtest to know something isn't right. Passed a few hours of p95 with no issue with 1333 ie no xmp, but very clear bsod and issues and worker fails immediately in p95 and hyper pi rounding errors when turning on xmp, including changing vtt/imc (and i tested with multimeter to make sure its definitely getting 1.2/1.15/1.65 and it is like .02 or higher for most, imc is at 1.148 and not 1.15 but thats insignificant).
I'll try it though. Suppose it can't hurt, maybe that'll rule out imc and core voltages or something.
edit: look what I found:
Unfortunately our PX538G2000ELK is only intended for the Intel P55.
The reason why it's not working at 2000 is because the Z77 does not have a native DDR3-2000 strap. Thus with XMP, it's setting the memory strap to 1866 and overclocking the CPU Baseclock to compensate. Unfortunately you might have to settle for manually setting it to 1866 and slowly increasing the Baseclock from 100-107 at it's max point.
Was getting nothing on multiple searches on this subject until I added "2000". This guy is talking about someone using a totally different system but the answer seems relevant.
edit2: actually i dont know. i mean in bios it says ram multi x20, and my fsb is 100.
edit3: turning up the multi (i see its not really a multi, its just ram divider simplified, ie 21 just goes to 2000mhz, x22 is 2133, etc) to 2133mhz seems to have fixed the issue. I mean hyperpi isn't getting rounding errors instantly, p95 is running. seems you cant run 2000mhz on z77 or something. thanks for the help, seems like ram is totally fine. just some weird z77 issue.Edited by Belial - 1/30/13 at 11:58pm