I'm currently using a 667mhz ddr2 1GB ram in the DIMM1 slot. My motherboard supports up to 4GB 800mhz ddr2 ram so I'm planning to get 2gb 800mhz ddr2 ram to upgrade my system. I'm just wondering if it would make any difference to my system's performance which DIMM slot I put the ram into, as it is running at a faster speed and has more memory then the other ram. My motherboard has 4 DIMM slots btw.