For those of yoyou are having random freezes set P1/P2 to auto and try. It fixed the problem for me. I was having the same problem with random freezes with both 2GB and 4GB sticks. Set P1/P2 to auto and so far so good. Also, 0603 gives back the memory bandwidth with P1/P2 on auto. I got almost 12K read with P1/P2 auto @445FSB with 0603.