Core i7 Vdimm/VTT Graveyard :D

[saaya]

i can benchs with my UD5 / OCZ D9GTR at 2.2/2.22v since 4/5 hours by day (in 5 days)

It's ok , i have too on aircooling my STT 1800 at 2.36/2.4v and no pb for me

what vtt setting?

:update: Well forget about me testing XMP profile, i just tried to use it and i couldn't post

yeah, thats the thing with xmp... there isnt any certification, anybody can create an xmp profile and ship it out and it could potentially have 2.4v vdimm and 1.1v vtt programmed in it too, which would kill the cpu or can damage the mem... thats why ive never been a big fan of xmp... and most mainboard makers dont like xmp

about qpi dram voltage... well initially asus called the bclock/qpi so then it kinda made sense to call vtt qpi/dram clock cause more vtt means a higher bclock/dram clock is possible... but like i said, thats just confusing in the end.
i hope people will stick to vtt... vtt is already well known from c2d and c2q anyways, even though it was a different voltage.

Using the Corsair 1600C8 on the Asus P6T-Deluxe with everything on AUTO, turning XMP profile on sets the voltage of VTT(QPI/DRAM) to 1.35V, and VDIMM to 1.66V. All other voltage settings remain on AUTO.

yeah but are you sure the xmp sets higher vtt?
or xmp sets vdimm and the bios then automatically increases vtt to adjust it to vdimm?

i asked our contacts at corsair, ocz, adata and gskill as well as intel and they said they dont know about xmp setting vtt? 0_o supposedly theres an xmp spec v1.2 but none of our engineers received it and when they asked their intel contacts they didnt know about it either...

i guess it does exist but wasnt really promoted/sent out very efficiently... or maybe many people ignored it cause nobody really likes xmp that much

Yep I'm sure because.. I write XMP SPD profiles as part of my job

It actually depends on what revision the XMP profile is under.
The up-to-date spec, v1.2, specifies "QPI (Bus) Core Voltage Level".
This voltage is simply ignored when used in non-X58 (X48, X38) systems.

Previous XMP specs (any DIMM that has an old XMP profile on it) do not include this voltage,
and thus will not automatically set a QPI (un)core voltage.

k, thanks... i guess ill just continue to email intel guys until somebody knows about the 1.2 doc and can send it to our engineers

Yeah, and I got lied to (along with the other users there), flamed, and ran off Corsair's Forum by a rep there for trying to help somebody by explaining that to them. Needless to say that won't be happening again. I am no longer a member there and will no longer use or discuss those products ever again. No good deed goes unpunished with them I guess.

sorry to hear about that