AN-M2HD with OCZ PC2 6400

[Guest]

I have had this board and memory running for about 1.5 years. I have 4GB, 4 single sticks of OCZ PC2 6400 memory. It was running fine and crashed on my son. I ran a virus scan and pulled off a couple. I updated the BIOS and have it running at 4-4-4-15 memory timing and set the voltage up to 2.0, but can now only run 2 sticks. If I try 4, the computer will not get to the post screen. If I set the timing to 6-6-6-16 and voltage at 2.0 it will boot to the post screen but its unstable and I can not boot to BIOS or anything. It just sits there. As soon as I pull 2 sticks out, it runs fine. I may try to go back to the BIOS I had but it wasn't working then either. Any help is most appreciated at this point.
Lyle

 

[Guest]

Found the problem. Took a bright flash light and found a small piece of lint packed down in the number 3 memory channel. Used some of that canned air and blew it out, works fine. One for the books, at least for me.
Lyle