Crossfired hd 5850 problem

amd phenom II x4 955 3.6ghz
4gb ddr3 1600
rosewill 750w psu
asus m4a79xtd evo

I just installed a second hd 5850, one is an his and one is a sapphire, when i try to change the fan speed on the second card in catalyst control center, the clocks, fan speed and tempeture all say 0. i have tried changing my regisrty( change the Enableulps in the registry) that did not work. what do i do
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  1. Nevermind, i got it up and running. I have one big problem though, i get a whooping 20 frame per second increase in the farcry 2 benchmark and my games dont run much faster. I made sure both cards are working but something was brought tomy attention. My motherboard runs at dual x8. Is this a problem.
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