Compare any two graphics cards:
GeForce GT 315 vs GeForce GTX 560
IntroThe GeForce GT 315 makes use of a 40 nm design. nVidia has clocked the core speed at 625 MHz. The DDR3 RAM is set to run at a speed of 790 MHz on this specific card. It features 48 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.
Compare those specs to the GeForce GTX 560, which features a core clock speed of 810 MHz and a GDDR5 memory speed of 1001 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 336 SPUs, 56 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce GTX 560 should in theory be much faster than the GeForce GT 315 overall. (explain)
Texel RateThe GeForce GTX 560 should be quite a bit (about 354%) more effective at AF than the GeForce GT 315. (explain)
Pixel RateIf using lots of anti-aliasing is important to you, then the GeForce GTX 560 is a better choice, 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 maximum amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.