ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. Because both graphics cards have the same number of Texture Mapping Units (TMUs). Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. This parameter is proportional to the number of TMUs and graphics clock rate. Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. It is measured in millions of texels per second. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). This is calculated by multiplying the total number of texture units of the card by the core speed of the chip.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. It especially helps with AA, High Dynamic Range and higher screen resolutions. The higher the memory bandwidth, the better the card will be in general. If it uses DDR type memory, the result should be multiplied by 2 once again. It's worked out by multiplying the interface width by its memory clock speed. Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second.

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