I have this mobo with two 512mb corsair xms pc3500 dimms and P4 3.0c CPU. If I let the SPD detect and set RAM latency, it picks 2.5-4-4-8-8. If I manually change it to 2-2-2-4-8, or anything else, it's still stable but benchmark scores (via Sandra, 3dmark03, etc) are much lower (sandra is like...