I have a NF750 - G55 MSI motherboard. I recently bought two 275 evga co-op cards, and yet they will not power up my monitor. I can hear vista starting through the speakers, buts that's it. Do they make a SLI ready amd3, ddr3 board that will work with this #&^! card? I called MSI, and EVGA . . . they cannot even answer my questions! PLEASE HELP!