Originally Posted by OCmember
Sounds like a PSU problem to me, but I could be wrong. What are you using for a PSU and Motherboard?
Plus 3.6GHz QPI is getting a little out of stability range for normal volts. I'd push a little more volts into the QPI & IOH core. Try running them at the same volts e.g. 1.30v for both.
Your uncore looks like it isn't being pushed too hard at 3.2GHz but for the heck of it try 1.25v
EDIT: Wait a minute. You are running 32GB with HT on? try running 8GB with HT off. Sounds like it's too much memory controller pressure for the chip and the board.
Now I tried it with only 1 module 8 GB and the 4,4 GHZ (191x23) seems to need less CPU voltage to be stable but not much. I didn’t test is intensively because after all it doesn’t make sense, I think at 1,46-1,47 volts or something like that it could pass 15 minutes of prime95 but I’m not 100% sure. It definitely crashed at 1,43 volts with 3B Bluescreen and 1,45 volts with freeze. The QPI/DRAM Voltage was 1,25 v the IOH at 1,3 volts. The Temperatures and power draw were a lot lower here with the less ram.
As sad why I should test something when it doesn’t make any sense, I want to use my full RAM and also want to upgrade to 48 GB soon. Also only Single-Chanel is bad. So it must be stable under full configuration. Turning HyperThreading off is not a good idea, because it cost a lot performance, but yes I know you need less voltage if it’s off.
I don’t know if it’s important but with the CPU I had before (i7 920 C0) it was not possible to reach more then 3,7 GHZ at 1,38 Volts. Everything above this was not only too hot, no it always crashed with Bluescreen regardless of voltages and I tried it so many times with no sucess. The same bad overcklocking results with the both X5660 the secound one I use now is a B-Batch modell and should need lower voltages then the A-Batch first one but it isn't so.
Somehow my system have a tendency to crash whatever you change in the BIOS and it is really sucks with time