On the example of the reference ATI RADEON HD 2600 XT 256MB DDR4 (800/2200 MHz).

Features:

• ATI RADEON HD 2600 XT GPU, 800 MHz clock rate
• Pixel processors: -
• Vertex processors: -
• Unified processors: 120
• Texture processors: 8
• ROPs: 4
• 256MB GDDR4 SDRAM in 4 Samsung BGA chips; 0.9ns fetch, 1100 (2200) MHz default memory clock
• 128-bit bus
• Supports DX10