Compare any two graphics cards:
GeForce GTX 285 1GB vs Geforce GTX 680
IntroThe GeForce GTX 285 1GB uses a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 RAM runs at a frequency of 1242 MHz on this model. It features 240 SPUs as well as 80 Texture Address Units and 32 ROPs.
Compare those specs to the Geforce GTX 680, which comes with a clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also features a 256-bit bus, and uses a 28 nm design. It features 1536 SPUs, 128 TAUs, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the Geforce GTX 680 should be quite a bit faster than the GeForce GTX 285 1GB in general. (explain)
Texel RateThe Geforce GTX 680 is a lot (about 148%) more effective at texture filtering than the GeForce GTX 285 1GB. (explain)
Pixel RateIf running with lots of anti-aliasing is important to you, then the Geforce GTX 680 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 largest amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.