DirectX10 will work with the 8800 series cards only right now. That is
for the hardware functions.
If you use a DX10 game, they have a compatibility that allows them to
use DX9 features.
If you have an older DX9 video card, you can run the DX10 games with
DX10 on your PC, but you will not get the additional DX10 graphical
features. It will just look different.
Dustin Harper
(e-mail address removed)
http://www.vistarip.com