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Originally Posted by casecutter
To anyone that doubts Crossfire, I have had SLI and now crossfire. Keeps up easily to SLI and not nearly as buggy as most people say/think. Probably a case of the good ole "User Error". If you get/got a Crossfire board, the RD580 boards are much better than the RD480 boards. BUT, Crossfire must have a ridiculously strong PSU. Even my PSU is said to have issues with it, but not for me yet. SLI isn't quite as bad, but still getting a super strong recommended unit for either is an absolute must!
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There is a conflict betwixt SLI and CrossFire:
SLI has one GPU communicating with 1 bridge and the same with the other, the north and south bridges have to communicate so there is a link between them, AMD hasnt specified the speed yet and that indicates that it is slower than the 8mb/s that the cards communicate at, this connection between the N and S bridges also creates latencies according to ATi. ATi has both GPU's communicating with the same bridge to eliminate this so called problem. the cards and chipsets are relatively deadlocked even with this SLI problem.