I take it you have the same type of memory[matched in pairs]. I had an asus board that did the same thing. I started the way most builders do when they bench test, I sarted with just 1 memory stick, l [left 1 rom in] and removed everything I could. With the Dell that started to act up I cleared the CMOS over night with the jumper in the clear setting. I was able to get the Dell to work, I ended up selling the Asus board and the guy who bought it said he cleared CMOS and replaced the battery and it fired right up. My first Abit board[NF7-S] came with no manual or drivers disc. It's used but one thing I can say is Abit really didn't look like it's site was much help. I am just about to test it. It does sound like a device problem. You can go online, if you updated your BIOS it may cause problems but I'd also look at the updated BIOS to see if there is a update with this problem listed. One last thing, if you have extra cables try them to see if it is the hdd cable, thats happened to me also.