Originally Posted by rctrucker
The motherboard is not "officially" compatible with the memory I have in it now.
Here are the voltage settings:
I attempted bumping up the Dram in increments all the way to 1.7v, without success.
Also upped the VTT to 1.254, 1.306, 1.358 without any success.
Attempted to set all timings and voltage manually, not using XMP, no success.
I'll be back in about an hour after this movie to try any more suggestions.
The VCCSA at 1.195v and the VTT at 1.202v seam really high from my experience. I have 8x4Gb modules running 1866 right now (the Samsung 30nm kits) and my VCCSA is at 1.05v and my VTT is at 1.10v. The seconmdary timings seem to play a big part in ram stability with the x79 chipset. Here are the settings I am trying to follow (might be more ram dependent) which you might find helpful. These might be more specific to the 30nm Samsung ram, but VCCSA and VTT are for the CPU's internal memory controller:
More on VCSSA and VTT:Xbit Labs: DDR3 SDRAM for LGA 2011: Which Memory Is BestBy Ilya Gavrichenkov | January 07, 2012
Edited by ericeod - 3/25/12 at 8:17am
However, during our conversations with Intel we managed to find out that only the increase to 1.1 V on VCCSA and to 1.2 V on VTT may be considered “safe” for everyday use in 24/7 mode. Moreover, you should also keep in mind the recommendation not to exceed 1.65 V for the memory voltage, otherwise, it may stimulate degradation of the memory controller and untimely death of your processor. However, you can almost always reach DDR3-2133 frequency even without using the “risky” settings.