for the 990fx sabertooth you use the two tan slots and then the dark brown slot. you dont want to use the black one for graphics card because it is an x4 pci-e slot. so 3 slot spacing. i didnt even have to read the manual for mine :biggrin: just look at the under side of the board and youll see its only x4 wired, who needs manuals :bleh:
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