Mouse it has nothing to do with cheap tactics...
it'll run on anything that can handle the Shader Specifications in Hardware mode, the Dawn & Ogre demos' run on the R480.
They don't run very well, and the colours look all washed out and nasty ... but they run.
The 5800/5900 demos won't run at all, simply because even the R480 doesn't yet support nv3x specification shaders.
It's nothing to do with a cheap tactic, it just a simple fact that the Radeons just don't support the technology... its like trying to get a Standard Pentium to run an MMX application, it can't do it because its missing the 57 opcommands required.
and really ATi have been pushing that the GeForceFX series are far far slower than thier own equivilants which just isn't true - so who do you think is more underhanded here?
The company who is simply making technology demos for thier own hardware to show them off to thier best potencial or the company who are deliberately trying to damage the reputation (and have succeeded) of the competitors product?
nVidia's Cg will run on Radeon cards which really personally i think they should've made specifically for only GeForce cards - but nVidia don't do business like that, they never have and i doubt they ever will.
They let the technology speak for itself - which anyone who owns these cards will see that they do
Unreal2 is an awesome test for the FX ... as it runs fantastically on it, specially the simply grass and light shaders
i the Media Centre the IntelliSample rateings reffer to the FSAA settings -
Aggressive, High Performance or Balanced? are you sure you have the 45.23 drivers?
as it should read:
High Performance (3x3)
Performance (5x5)
Quality (9x9)
and thats the texel sample lookup rating ...
you should have available to you
2x, Quincunx, 4x, 4XS (Direct3D), 8x, 8XS(Diret3D)
the 5900 also has 12x available