Overclocking

Overclocking of 1090T was done using a solid voltage bump up to 1.50 V, and increasing the unlocked multiplier until the maximum stable frequency is reached. In this case, using a small Scythe Katana III cooler, the best stable result was 4100 MHz, which is an excellent result for an AMD processor. Especially considering we're dealing with six beefy cores here.
Six overclocked cores certainly sounds good, it might be just as bad. Power consumption jumps through the roof, and you will be needing a massive CPU cooler to keep temperatures in check. If you want to keep it at maximum stable clocks, that is. For some medium overclocking, say 3600-3800 MHz on all cores might be achieved with just a small voltage increase over stock settings, which means no drastic changes in temperatures or power consumption. All in all, great results as far as overclocking goes, and performance of the overclocked processor for that matter.

x264 HD

Cinebench

Modern Warfare 2

System Power Consumption

Temperatures

At stock settings Phenom II X6 1090T runs surprisingly cool, even when cooled with average cooler like Katana III. BIOS settings were set to PWM - Standard regulation for fan speed for stock speed. But as soon as you start to play with voltages temperatures rise really fast, so additional ventilation around power regulation was required to keep processor temperatures bellow critical point. Katana II was set to Turbo setting in BIOS while overclocking the processor.