Hey guys / gals.
In the old days (i.e. socket 1366 / x58) it was widely accepted that the QPI/VTT - QPI/DRAM had to be set within .5v of the DRAM voltage.
Is the .5v rule still applicable to socket 1155 and specifically Ivy Bridge? I've done a lot of online research and the responses I've found range from one end of the spectrum to the other.
I'd appreciate it if someone with o/c experience on Ivy Bridge give me some guidance. I'm completely 4.4Ghz stable @ 1.20v core on this 3770K and it only takes 1.08v on QPI/VTT to get my memory stable at 2133Mhz.
But the catch is that my DRAM voltage spec. is 1.65v @ 2400Mhz, however it will happily run at 1.63 - 1.64v for 2133Mhz.
Right now the difference in my QPI/VTT is; 1.64v DRAM - 1.08v QPI/VTT = .56v
So do you think I'm ok with that difference? Or, would it be better to set QPI/VTT to 1.14v and keep it within .5v of the DRAM voltage?