Most websites say X800XT PE has a 560MHz mem clock.
If you goto the ati website and do a priduct comparison of X800XT PE AGP and X800XT PE PCIe, they both show 575MHz as the mem clock.
<font color=blue>Futile is resistance,</font color=blue><font color=red> assimilate you we will.</font color=red>
<b>Hard work has a future payoff. Laziness pays off now.</b>