Warp2Search had a talk with Terry Makedon from ATI about the current 3D Cards from ATI because they promise OpenGL 2.0 compatibility in their marketing material :
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Some new features of OpenGL 1.5 :
* Vertex Buffer Object: vertex arrays for higher performance rendering
* Shadow Function: additional comparison functions for shadow mapping
* Occlusion Query: asynchronous occlusion test for better culling
* Non power-of-two Textures: for more efficient use of texture memory, including mipmaps
* OpenGL Shading Language v. 1.0: as official extensions more specifically, shader objects, vertex shaders, and fragment shaders, all for use of programmable shader hardware
Source : Warp2Search