Quote:
Originally Posted by Calindor
I heard $410, Also afaik the chips arent hooked up via crossfire/sli like all other X2 cards, its supposed to be the first ever dual GPU card with integrated processors (IE they work as one, rather than 2 hooked up in crossfire). Its also supposed to be the first x2 card to not have microstuttering because of this, and also far greater performance. It already has some benchmarks in some games beating two GT280's hooked up in SLI...imagine that.
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The GPUs still operate separately in the 4870 x2 although there is now some (as of yet unknown) amount of communication between the GPUs via a "Crossfire Sideport". Here's the architectural diagram (borrowed from anandtech's preview on the 4870 x2):
The GPU<->GPU communication will eliminate some of the decision making done by the drivers running on the CPU but they're not quite one cohesive unit just yet. The Crossfire Sideport is much like the SLI bridge that's used on the NVIDIA cards - two 4870s in Crossfire marginally beat one 4870 x2, according to the benchmarks I've seen.