Quote Originally Posted by saaya View Post
well thats what xmp and epp are meant for, they can set vdimm too, but what i mean is that some mainboards BIOS increase vdimm to much more than the xmp has programmed in it (up to 2.1v) if you select high bclock or memory clock settings.


huh? your xmp profile increase uncore voltage?
and to 1.55v? wee, thats a big high isnt it?
i mean everybody is running 1.55 uncore when pushing i7 it seems, but it shouldnt be the default setting!

you can run higher qpi with lower uncore, what do you mean?
higher qpi ratio? higher bclock? higher overall qpi speed?
with lower uncore voltage or lower uncore ratio?

update about the first dead i7:
it was a 965 and it died after one day of 2.2-2.4v vdimm
at first when i started testing i found that i had to run high uncore to get stability

i've figured out how to run high BCKL without high uncore voltage now
thats what i meant

yeah when you select profile 1 in XMP profile it says that vdimm is 1.65 and QPI voltage is 1.55...i assume that is uncore voltage

it took me a while to realise that to get stable BCKL you have to run QPI clocks at 4xRAM MHz

so 900 on RAM has to be 900x4=3600 in QPI or forget about stability

i've been running around 1.42v uncore and 1.74vdimm for most benches
i've also had the vcore at 1.5-1.55 on air in the last few sessions

i'm already sick of air testing
will have to insulate this GB board for single stage....pain in the arse to insulate

saaya can you ask the guy if he ran low vcore with high vdimm
i have a feeling that you have to jack up the vcore as well when you run high vdimm like back in AMD days ...i do it as a precaution lol