I have an x800 XT sapphire 256mb card. In everest under "Display" GPU / it shows my core clock at 500 mhz, and my ramdac clock at 400 mhz. In everest under "computer/overclock"/ it shows my GPU core clock at 500 mhz, and my memory clock at 500 mhz. In CCC it shows my clock core at 500 mhz, and memory 500 mhz. I am just worried about that 400 mhz showing up under ramdac in everest, under the display section. Is ramdac the same thing as the memory clock? I am confused here, are my speeds ok? I was told 500/500 is the correct stock speeds for an x800 XT.