AMD's Six-Core Phenom II X6 1090T & 1055T Reviewedby Anand Lal Shimpi on April 27, 2010 12:26 AM EST
The Phenom II X6 1090T is a Black Edition part, meaning it has a fully unlocked clock multiplier. With very little effort our 3.2GHz sample was up and running at 3.80GHz without any additional cooling beyond the stock heatsink/fan.
With a little extra effort, 3.9GHz should be possible, but the fact that we can even run at 3.8GHz with six 45nm cores is very impressive. Update: You asked, and we pushed harder. Our 1090T sample can hit 4GHz at 1.45V and even reach 4.1GHz but not with great stability. The even more important takeaway is that AMD's 64-bit/4GHz limits appear to be gone with Thuban.