Compare any two graphics cards:
GeForce GTX 480 vs GeForce GTX 580
IntroThe GeForce GTX 480 features a GPU core clock speed of 700 MHz, and the 1536 MB of GDDR5 RAM is set to run at 924 MHz through a 384-bit bus. It also features 480 Stream Processors, 60 Texture Address Units, and 48 Raster Operation Units.
Compare that to the GeForce GTX 580, which features a GPU core clock speed of 772 MHz, and 1536 MB of GDDR5 memory running at 1002 MHz through a 384-bit bus. It also is comprised of 512 SPUs, 64 TAUs, and 48 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce GTX 580 should in theory be a bit faster than the GeForce GTX 480 overall. (explain)
Texel RateThe GeForce GTX 580 will be a little bit (about 18%) more effective at texture filtering than the GeForce GTX 480. (explain)
Pixel RateThe GeForce GTX 580 is a small bit (approximately 10%) more effective at anti-aliasing than the GeForce GTX 480, and will be capable of handling higher resolutions without losing too much performance. (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 (in units of MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 most pixels the video card could possibly write to its local memory in one 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 - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.