I installed a used 2 gig Gefore card into my mobo to upgrade from a 1 gig. The system started to freeze. (Windows7). I put the old card back in now I get a studder during the only game I play (World of Tanks). I purchased a New Gefore card to eliminate the issue but it still persists. Also reloaded Windows. Could my mobo be fried? Please help.
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