Compare any two graphics cards:
GeForce GTX 570 vs GeForce GTX 660 Ti
IntroThe GeForce GTX 570 features a core clock frequency of 732 MHz and a GDDR5 memory speed of 950 MHz. It also makes use of a 320-bit bus, and uses a 40 nm design. It is made up of 480 SPUs, 60 TAUs, and 40 ROPs.
Compare all that to the GeForce GTX 660 Ti, which makes use of a 28 nm design. nVidia has clocked the core frequency at 915 MHz. The GDDR5 RAM is set to run at a frequency of 1500 MHz on this specific model. It features 1344 SPUs along with 112 TAUs and 24 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the GeForce GTX 570 is 6% quicker than the GeForce GTX 660 Ti in general, due to its greater data rate. (explain)
Texel RateThe GeForce GTX 660 Ti will be a lot (more or less 133%) more effective at AF than the GeForce GTX 570. (explain)
Pixel RateIf running with a high resolution is important to you, then the GeForce GTX 570 is superior to the GeForce GTX 660 Ti, 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 maximum amount of information (measured in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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 - the lower the bandwidth is, the lower the ability to reach the max fill rate.