Mainstream underclocked version of X1800 with 4 disabled pipelines.

Radeon X1900 XT with faster memory.

Entry level desktop card with DDR2 memory.

Replacement of Radeon HD 4830 using faster GDDR5 memories but on 128bit bus with PCB from HD 4870.

Mainstream card with Eyefinity support and GDDR5 memory.

Mainstream DX10.1 card.

Hi-end card from 2007. First GPU with 512-bit memory bus on market. Some versions have even faster GDDR4 memory and 1GB VRAM.

Mainstream DirectX 10 card.

Lowend HD2xxx series Radeon.

Highend replacement of Radeon X1800 XT with tripled pixel shaders.