Compare any two graphics cards:
GeForce GTX 660 vs Geforce GTX 680
IntroThe GeForce GTX 660 has a clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It features 960 SPUs, 80 Texture Address Units, and 24 Raster Operation Units.
Compare all of that to the Geforce GTX 680, which comes with a clock frequency of 1006 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The Geforce GTX 680, in theory, should be quite a bit faster than the GeForce GTX 660 in general. (explain)
Texel RateThe Geforce GTX 680 will be quite a bit (approximately 64%) more effective at AF than the GeForce GTX 660. (explain)
Pixel RateIf using lots of anti-aliasing is important to you, then the Geforce GTX 680 is a better choice, by far. (explain)
Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.
Price ComparisonPlease note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.