Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. It is measured in millions of texels processed in a second. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. It especially helps with AA, HDR and high resolutions. The higher the memory bandwidth, the faster the card will be in general. If it uses DDR RAM, the result should be multiplied by 2 once again. The number is calculated by multiplying the card's bus width by its memory speed. Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved across the external memory interface in a second.

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