Compare any two graphics cards:
GeForce GTX 295 vs Geforce GTX 680
IntroThe GeForce GTX 295 uses a 55 nm design. nVidia has clocked the core speed at 576 MHz. The GDDR3 memory works at a frequency of 999 MHz on this particular model. It features 240 SPUs as well as 80 Texture Address Units and 28 Rasterization Operator Units.
Compare all of that to the Geforce GTX 680, which has clock speeds of 1006 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the GeForce GTX 295 is 16% faster than the Geforce GTX 680 in general, due to its greater data rate. (explain)
Texel RateThe Geforce GTX 680 will be much (about 40%) more effective at AF than the GeForce GTX 295. (explain)
Pixel RateIf running with a high screen resolution is important to you, then the GeForce GTX 295 is superior to the Geforce GTX 680, but only just. (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.
One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.
GeForce GTX 295
Geforce GTX 680
Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the most pixels the graphics card could 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 Raster Operations Pipelines 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.
GeForce GTX 295
Geforce GTX 680