I'm interesting why we don't have acces for any of these functions on HD2900 cards? As I remember on X1950 we had Fetch4, which wasn't avaiable in OpenGL (but maybe it was avaiable in ogl and I'm a wrong?), but was very nice feature. I don't think so this feature was cut from HD2900 hardware, so why AMD didn't offer support for this feature in Catalyst drivers? I know that GL_ARB_texture_gather require full DX10.1 support so units in HD2xxx may be not full compatible with specification of this extension, but GL_AMD_texture_texture4 was introduced by AMD, so I think that they can adopt this extension for HD2900 specification, but they didn't it. Why?