The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. It is measured in millions of texels applied in one second. The higher the texel rate, 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 by the core speed of the chip.

It has a 256 bit wide memory bus, which results in 192.26 GB/s memory bandwidth.

The GeForce GTX 680 incorporates 2 GB of GDDR5 memory, clocked at 1.502 GHz. It also has 1536 CUDA cores, 32 ROPs, as well as 128 texture units. Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. The card runs at 1.006 GHz, and can be boosted as high as 1.058 GHz. It especially helps with anti-aliasing, HDR and higher screen resolutions.

The higher the bandwidth is, 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 calculated by multiplying the card's interface width by its memory clock speed. Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in one second.

Nvidia gtx 680 4g