Looks like one web store is advertising 612MHz GPU core clock
look here
We will find out in a few more days...
I'll just quote myself from the other 590 thread:
If this runs under 600MHz core, then this product is a friggin waste of silicon. Why put it out there if you can achieve similar performance with a pair of 560s@900MHz and in the same power envelope no less. Unless of course your main purpose is to greatly stretch your profit margins and rip off your customers?
I bet this is also one of the reason EVGA and Galaxy put 460 cores in their dual solutions - they were simply denied to use proper 560s because they would step all over the 590's heels at almost half the price...
I hope I'm wrong but things are starting to smell very fishy...
A pair of 560s OCed:
"Subjective obtained GPU power consumption = ~ 298 Watts"
A 6990:
Notice how they both produce 102fps@19x12 in BC2. The only reason the 560 fall back at 25x16 is because of their 1GB memory buffer.
I'd use W1z's charts but he doesn't seem to have an overclocked sli review.