X79A-GD65 (8D) - Get stuck at 12x cpu ratio multiplier or 1200MHz

Question

Hi all.  Just wanted to see if anyone else observed this with the new X79 chipset motherboard and the 3930K or 3960X sandy bridge-e cpu.
When trying to overclock the motherboard in any way
1) CPU Ratio set to any number
2) Per Core Maximum ratio / multiplier
3) OC Genie II
and then trying a CPU stress utility such as Prime95
The CPU gets locked at 1200Mhz, or 12 x 100Mhz and never goes higher than that.  At the same time, the temperature sensors believe the CPU is locked at 91 degrees celsius.  So I believe on this bios version of 1.2 on the MS-7760 motherboard (X79A-GD65), it thinks 91 degrees is too hot, and never goes above 1200MHz.  I've also tried OC Genie and manual overclocking at bios version 1.1, and I cannot go over 1200Mhz.
Only at stock speeds (no overclocking), with the 3930K, at full CPU load tests with Prime95, it does go to 3500Mhz, or 35 x 100, correctly.
Right now I cannot overclock at all, whether with OC Genie, or manual cpu ratio multipliers.
Tweaktown and HWBot and several other websites have observed this.  I'm running the latest 1.2 bios, and still get stuck at 12x.
http://hwbot.org/forum/showthread.php?s=51e18bdfe400391d0955716a5c66343d&p=138647#post138647
http://www.tweaktown.com/reviews/4423/msi_x79a_gd65_intel_x79_motherboard_review/index5.html

Answer 1

Scratch that.  It was happy yesterday, but first boot of the morning today and back to stuck at 12x/91C.  Will changing other voltages remedy this?  I read something on a review website suggesting this was a problem with the actual 3930K/3960X chips, and not necessarily a motherboard issue.
If I raise my cpu base clock from 100 to 125 and use a 36 multiplier, the machine forces the memory to run at 2,000 MHz, which according to the SPD shown in bios should be OK, but I couldn't get it to boot like that.  Is there anything I can change to allow the machine to work in that configuration?
Edit:  Just read yet another OC review (this time on HardwareSecrets) and found the following:
"The “correct” way of overclocking Intel CPUs with Turbo Boost technology is to change the clock multiplier that each core will use when the Turbo Boost technology kicks in."
I just tried changing the core ratio limit for all six cores to 45, setting the cpu ratio to auto, and leaving the core voltage at 1.375V, and it seems to work again.  Boots into Win7, coretemp displays correct temperatures, and when I load the cpu using prime95, it hits 4.5GHz.  I will try setting core voltage to auto also so that the cpu doesn't stay at 1.375V at idle when not necessary.  I'd still like to OC the memory in theory - not sure how much boost I'd get by running the memory above 1600 MHz.  I'll be using this PC for some computational fluid dynamics, so every bit of speed I can eek out of it will be put to use.
Edit 2:  Auto core voltage works, vcore drops to 0.840V at idle, and idle temps drop back down closer to room temperature (using an Antec Sonata Elite case with a Corsair H80 water cooler, so slightly less airflow than ideal but I have the case fans optimized for now by relocating the system blower fan to a drive bay and adding a 120mm fan in the lower drive bays pulling air out of the side of the case).