I currently have a G33bu motherboard from intel. i plan to buy a graphics card to play games. for future upgrade on motherboard reason, i plan to buy either sli or crossfire enabled GPU and try it first with my current board before i migrate to a board which explicitly says that it support crossfire or sli. does putting either sli or crossfire enabled cards to DG33BU (G33 chipset) will cause any problem? does an sli/crossfire enable cards can work singly on a board does not have dual gpu capabily? please help