I have a PNY 2gb pc2-6400-800mhz RAM module. I opened CPU-Z and went to the memory section and it told me my DRAM frequency was at 400mhz. Because it is a 6400-800mhz I thought it would run at 800mhz. DDR ram runs at 400mhz why is my high grade DDR2 running at low speeds? It only says that it can go backwords to 533mhz, 667mhz, and max 800mhz. any help?