Compare any two graphics cards:
GeForce GTX 650 Ti vs GeForce GTX 660 Ti
IntroThe GeForce GTX 650 Ti has a core clock speed of 928 MHz and a GDDR5 memory frequency of 1350 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 768 SPUs, 64 TAUs, and 16 Raster Operation Units.
Compare those specifications to the GeForce GTX 660 Ti, which has a core clock speed of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 192-bit memory bus, and makes use of a 28 nm design. It features 1344 SPUs, 112 TAUs, and 24 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the GeForce GTX 660 Ti is 67% faster than the GeForce GTX 650 Ti in general, due to its higher data rate. (explain)
Texel RateThe GeForce GTX 660 Ti is much (about 73%) more effective at AF than the GeForce GTX 650 Ti. (explain)
Pixel RateIf using a high resolution is important to you, then the GeForce GTX 660 Ti is the winner, 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.
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.