"During the experiments on our six-core processor we managed to get it to run stably at the default voltage at 3.7 GHz frequency. The junior CPU from the six-core family also performed well and remained stable at the same frequency.
The base clock was increased to 265 MHz to achieve this result. We didn’t change any voltages and their automatic adjustment was disabled in the mainboard BIOS. Turbo Core technology was disabled, as we recommend, and the multipliers for HyperTransport bus and North Bridge built into the processor were lowered to 8x, which made the frequencies of corresponding system units just a little over 2.0 GHz."
(Above quote taken from the link below.)
Maybe this will help you out? If you haven't read it already. (It looks like your HT is too high. IDK though.)http://www.xbitlabs.com/articles/cpu/display/amd-phenom-ii-x6-1055t-overclocking.html
*Note on the bottom of page 4 on the link.....
"The thermal diode in the first batch of Phenom II X6 processors appeared to be improperly calibrated. As a result, processors were reporting obviously lower temperatures."
And on page 2.
"I have to say that AMD is formally shipping two Phenom II X6 1055T modifications at this time: one with 125 W TDP and another one with 95 W TDP. In fact, you can currently purchase only the former, less energy-efficient one. This was the one we got, as you can see from the CPU marking that states: “HDT55TFBK6DGR” (for your information: 95 W processor should be marked as HDT55TWFK6DGR)."
*oh, I almost forgot. You are running the newest bios for your mainboard? (A newer bios could theoretically include a cpu microcode update that might fix the temp problems?) Anyone?