The following is a list that contains general information about GPUs and video cards by AMD, including those by ATI Technologies before 2006, based on official specifications in table-form. Field explanations The headers in the table listed below describe the following: Model – The marketing name for the GPU assigned by AMD/ATI. Note that ATI trademarks have been replaced by AMD trademarks starting with the Radeon HD 6000 series for desktop and AMD FirePro series for professional graphics. Codename – The internal engineering codename for the GPU. Launch – Date of release for the GPU. Architecture – The microarchitecture used by the GPU. Fab – Fabrication process. Average feature size of components of the GPU. Transistors – Number of transistors on the die. Die size – Physical surface area of the die. Core config – The layout of the graphics pipeline, in terms of functional units. Core clock – The reference base and boost (if available) core clock frequency. Fillrate Pixel - The rate at which pixels can be rendered by the raster operators to a display. Measured in pixels/s. Texture - The rate at which textures can be mapped by the texture mapping units onto a polygon mesh. Measured in texels/s. Performance Shader operations - How many operations the pixel shaders (or unified shaders in Direct3D 10 and newer GPUs) can perform. Measured in operations/s. Vertex operations - The amount of geometry operations that can be processed on the vertex shaders in one second (only applies to Direct3D 9.0c and older GPUs). Measured in vertices/s. Memory Bus type – Type of memory bus utilized. Bus width – Maximum bit width of the memory bus utilized. Size – Size of the graphics memory. Clock – The reference memory clock frequency. Bandwidth – Maximum theoretical memory bandwidth based on bus type and width. TDP (Thermal design power) – Maximum amount of heat generated by the GPU chip, measured in Watt. TBP (Typical board power) – Typical power drawn by the total board, including power for the GPU chip and peripheral equipment, such as Voltage regulator module, memory, fans, etc., measured in Watt. Bus interface – Bus by which the graphics processor is attached to the system (typically an expansion slot, such as PCI, AGP, or PCIe). API support – Rendering and computing APIs supported by the GPU and driver. Due to conventions changing over time, some numerical definitions such as core