Likely to be either a bios problem, fluff in the memory slot causing a bad connection or the mobo or memory is screwed :/

No Jeremy, put it down!

Technical Support!

correction* just had a bsod, so 3 mem cards it is

something weird just happened with my old mobo.

I was in windows (7), just checked if my wifi adapter worked, which it did, and all of a sudden my keyboard failed to work. I unplugged and checked it with my other computer and it worked fine. So I did a restart. And BAM I got a memory error during POST :/

At the time I had both memory slots A2 and B2 occupied, just like the manual suggested if you only had 2 memory cards. (memory slots: A1 A2 B1 B2)

So I first checked if both mem cards were properly seated (check), restart..failed again
Next I checked with only 1 card in A2 slot..wow, I got into windows
Checked with 3 cards...yep, got into windows too
Checked with 2 different cards in A2 and B2...failed again
Checked with 1 card in B2..failed (which I figured)

So technically, according the laws of IT if I applied a card into the 4th slot it would fail

Checked with 4 slots filled...booted fine into windows
??? what ???

I think something in the most recent updates has upset win7 as I've also been having odd behavior from my network connection the last few days :/