Compare any two graphics cards:
GeForce GTX 480 vs GeForce GTX 560
IntroThe GeForce GTX 480 features a clock speed of 700 MHz and a GDDR5 memory speed of 924 MHz. It also uses a 384-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 60 Texture Address Units, and 48 Raster Operation Units.
Compare all that to the GeForce GTX 560, which uses a 40 nm design. nVidia has clocked the core speed at 810 MHz. The GDDR5 RAM is set to run at a frequency of 1001 MHz on this specific model. It features 336 SPUs as well as 56 Texture Address Units and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Performance-wise, the GeForce GTX 480 should theoretically be a lot superior to the GeForce GTX 560 overall. (explain)
Texel RateThe GeForce GTX 560 will be a small bit (more or less 8%) faster with regards to anisotropic filtering than the GeForce GTX 480. (explain)
Pixel RateThe GeForce GTX 480 will be a lot (more or less 30%) faster with regards to AA than the GeForce GTX 560, and capable of handling higher screen resolutions better. (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: Memory bandwidth is the largest amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units by the core 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 applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.