Quote Originally Posted by Kunaak View Post
I think one actual notable difference between the Ultra and GTX might be memory used.

this review states that the Ultra uses .8 NS ram, to get that 2.2 ghz mem speed, while the GTX uses 1.0 NS (if I recall right)... so theoretically, the Ultra should be alot more clockable on the memory, then the GTX is...
It also says it has a lower TDP at higher frequencies then the GTX, using improved transistor design. If its true, a core revision may also help the OC.