This is my first DFI system and right out of the box I've been having a problem with the BIOS not accessable after reboot. I originaly started with power supply, 2x512 ram in 2and4 slots, and 2 geforce6800s with SLI jumpers on 2and3pins. The system boots, I hit del and enter CMOS. Now wether I make changes or not, upon reboot the keyboard doesn't work and after post screen is a blank screen with blinking cursor. I cleared the CMOS, tried again and got the same thing. This happens with 1 RAM and 1 video card too. I have to clear CMOS each time to get to BIOS. So, I tried taking the battery out and leaving the jumper on clear for an hour like someone on here suggested, and then I just put 1 videocard & 1 RAM in the 1st slot, now I get 3 leds on the debug and it wont detect the ram. I put it back the way I had it and still nothing. It won't work at all now. Somebody please help me do I have a bad board/bios?