Sapphire Radeon X800XL 512MB card
 

One might be curious what else has changed from the X800 XL line
besides the additional memory and to answer that, not much. The card
maintains the 400MHz core and the 980MHz memory speed. The R430 GPU
remains the same as the 256MB model as well with no tweaks to enhance
performance. The only difference is that of additional memory units on
the card and the inclusion of Rage Theater chip onboard.

We also have news of 32 and 64 bit drivers for the Athlon 64 X2 that
enable the power saving features for AMD's new dual core CPUs.

http://www.amdzone.com/modules.php?o...tid=138&page=1