Core i7 Vdimm/VTT Graveyard :D

[zads]

what vtt setting?
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.

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


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

Merry Christmas guys

Actually, there is a pretty thorough Intel certification process,
just like there is for SLI/EPP 2.0 profile memory.
Only profile 1 (Intel certified settings) is required to go through certification.

It is also possible for memory module manufacturers to just write an uncertified Intel XMP profile on their memory..
(the same goes for SLI/EPP 2.0 profile memory)
However, if they are uncertified they aren't allowed to put "Intel XMP certified" on their product,
or put any Intel Extreme certified logos on their products.
This is an example of an Intel XMP-certified module WITH logo:


Since its Christmas eve, and I'm not so busy at work today,
I've made some snippets to show you guys the Intel XMP spec and certification process:

[Xello]

Found this also in my board's manual;

Profile QPI Voltage

This value is dependent on the Extreme Memory Profile (X.M.P.) settings. When Extreme Memory Profile (X.M.P.) is set to Disabled, this item will display as 1.2V. When Extreme Memory Profile (X.M.P.) is set to Profile1, this item will display the value based on the SPD data on the XMP memory.

Weird with the 1.2v, my board's stock vtt is 1.15v.