Compare any two graphics cards:
GeForce GTX 650 Ti vs GeForce GTX 660 Ti
IntroThe GeForce GTX 650 Ti makes use of a 28 nm design. nVidia has clocked the core speed at 928 MHz. The GDDR5 memory runs at a frequency of 1350 MHz on this particular model. It features 768 SPUs as well as 64 Texture Address Units and 16 ROPs.
Compare those specs to the GeForce GTX 660 Ti, which comes with a core clock frequency 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 is comprised of 1344 SPUs, 112 TAUs, and 24 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce GTX 660 Ti, in theory, should be quite a bit faster than the GeForce GTX 650 Ti in general. (explain)
Texel RateThe GeForce GTX 660 Ti should be a lot (more or less 73%) faster with regards to texture filtering than the GeForce GTX 650 Ti. (explain)
Pixel RateIf using a high resolution is important to you, then the GeForce GTX 660 Ti is superior to the GeForce GTX 650 Ti, and very much so. (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 megabytes per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.