GLX_AMD_gpu_association http://www.opengl.org/registry/specs/AMD/glx_gpu_association.txt GLX_AMD_gpu_association GLX_GPU_VENDOR_AMD 0x1F00 GLX_GPU_RENDERER_STRING_AMD 0x1F01 GLX_GPU_OPENGL_VERSION_STRING_AMD 0x1F02 GLX_GPU_FASTEST_TARGET_GPUS_AMD 0x21A2 GLX_GPU_RAM_AMD 0x21A3 GLX_GPU_CLOCK_AMD 0x21A4 GLX_GPU_NUM_PIPES_AMD 0x21A5 GLX_GPU_NUM_SIMD_AMD 0x21A6 GLX_GPU_NUM_RB_AMD 0x21A7 GLX_GPU_NUM_SPI_AMD 0x21A8