WoW is still stuck in 32-bit world and can't use more than 2gig of ram... So I doubt it...
EDIT: Not that the issues are related, just stating that their support for "modern" hardware is lacking
Cataclysm is supposed to bring along improved memory usage (not more, just more efficient) but I don't see them supporting SLI anytime soon, if only becuase they are more "friendly" with ATI and crossfire (which does little as well)
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