Quote:
Originally Posted by DanTheBanjoman
Its a lot simpler actually. GPU A can't access the VRAM on card B fast enough. It would simply cripple memory performance and thus destroy performance.
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^ this.
as it stands, they just release cards with more Vram than they need, so that theres still leftover room for crossfire and SLI to use.
short of a new version of directX or oGL (and corresponding hardware) to be designed from the ground up to scale better in multi GPU, it wont happen.