Hello, I need to buy memory for a ECS P4M800PRO-M v2 motherboard with a Pentium D 805 CPU. This system normally runs a 133 MHz bus clock giving specified 533 MHz memory speed. However, I am planning to experiment with overclocking, so thinking to buy 667MHz (PC2-5300) or even 800MHz (PC2-6400) memory. My question is, will this faster memory work at the normal 533 MHz speed, in case the overclocking does not work...? Has anybody run a system with faster memory than specified... or have any comments...? Thanks..!