Have you thought about testing the HD 4850 with the Accelero S1 passive?
Is that motherboard the DFI LANParty UT X48-T3R? If it is then it does have 2-way CrossFire at x16/x16 bandwidth.
Unless it's an optical illusion then it looks like installing a CrossFire setup with fans on the Accelero S1 wouldn't work. What do you think?







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