BSOD help!
 

ok so i upgraded my computer parts about 8 months ago.... everything ran perfect and fast and now just recently system seemed to slow down... first IE8 took longer to load, then i would get random BSOD restarts on occasion, and last night i got BSOD restart then the system kept on restarting over and over as soon as it logged into windows. Now i tried and it runs fine but get this message at the bios scree:

DQS training failed on previous boot reverted to slower DRAM speed


anyone knw wtf is going on? i thought it was software, but if it was the DQS msg should show? and i swapped out my ram sticks and still same message, pulled 1, swapped 1, swapped both. so dont think it's ram either.... could it be the Mobo fuked up?

system specs:

athlon 64 5000+
asus m2n-mx se plus mobo
ocz gold 2x2gb pc6400
XFX 9800gt vid card

oh btw ram memtest86 and it was fine