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I just bought a radeon 9800 pro 256mb version

I have a question about it

Does anyone know the information regarding the videoshader technology?

Is it always enabled or is options available and what apps does it function in (the drivers have no help on this nor does the web site)

I'm not sure what you mean by "videoshader". I assume you're talking about pixel shaders.

It's part of the OpenGL and DirectX spec which are the two graphics APIs. If it's coded in the game or application and the card is compliant (since it's the latest card in ATI's lineup it will), they will be used. If it isn't coded in, you won't see it.

Most of the newer games are using more advanced shaders, earlier versions might have limited shader use.

look at

http://www.ati.com/companyinfo/glossary/includes/list.html#vshader

it is called video shader it has to do with displaying video playback