Benchmarks zu Windows 2000/DX8 habe ich schon hier -
http://www.wcm.at/ubb/Forum5/HTML/000290.html gepostet.
Und falls es wirklich Probleme gibt hat Tweaktown die Lösung (habe gerade diese Email bekommen

):
DX8 Uninstaller
With the recent release of Microsoft DirectX8 and all the reports about lower 3DMark scores, incompatibility issues, game crashes while using the new version of DirectX... The gentleman down under at TweakTown, have kindly uploaded a program to their server and have made it available for download to everyone. The program is called DX Uninstaller, it will uninstall DirectX8 if you are unhappy with it like many others are and revert you back to your previous version of DirectX. Grab it here! (683kb)
URL:
http://www.tweaktown.com/files.shtml#dx