Please can any one help.I have 2x6600GT msi cards installed in a brand new amd64 4000+,A8N-SLI board,420 watt psu,512mb memory with another 512 on the way.When i click on the box 2 enable the SLI the computer restarts but all i get is a very dim glow to the screen.I dont think windows has restarted, and i have to reboot in last configureration and settings to get windows to restart.SLI is then back to single card.I downloaded the latest drivers from NVIDIA but still no better of.People say to flash the m-board bios,how do i do this and is it safe for a brand new system.I have made sure that the selector card is in the right way to. ANY HELP WOULD BE GREAT