Quote Originally Posted by Lanek View Post
you are optimisit, ( this is not a troll ) 2x 580 @ 650mhz will never close them ..

580 are @ 772mhz and the 6990 should be a little bit under of this ( 5-7% ) ....

And we know all how the core clock or shader speed have a big impact on Nvidia ALU. I don't want say AMD or Nvidia will be faster ( waiting the test ), just the 650-670mhz look don't enough.
at 670mhz it should be just a hair under 2x GTX570s in SLI and = HD6990 @ 830MHz

heck, lets just wait for the actual reviews