GeForce 8500 and Radeon HD 2400 are not yet powerfull enough to display all the efect of DX 10 game. BUT perhaps enough to play SOLATIRE :)). AND more importanly to decode VP1 and H.264. Can someone please test the UDP and Pure Video HD AGP Version on lowest Pentium 3, to prove that both of them (pure video HD and AVIVO)realy take care of processor task.

Not ALL the processing. There is no chance a p3 could decode a normal HD disc - the DRM processing alone would bring it to its knees. 

Now without DRM, I wouldn't know.