Compare any two graphics cards:
GeForce GTX 285 1GB vs Geforce GTX 680
IntroThe GeForce GTX 285 1GB has a clock speed of 648 MHz and a GDDR3 memory speed of 1242 MHz. It also uses a 512-bit bus, and makes use of a 55 nm design. It features 240 SPUs, 80 TAUs, and 32 Raster Operation Units.
Compare those specifications to the Geforce GTX 680, which makes use of a 28 nm design. nVidia has clocked the core speed at 1006 MHz. The GDDR5 RAM runs at a speed of 1502 MHz on this card. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically, the Geforce GTX 680 should perform quite a bit faster than the GeForce GTX 285 1GB in general. (explain)
Texel RateThe Geforce GTX 680 is quite a bit (approximately 148%) faster with regards to AF than the GeForce GTX 285 1GB. (explain)
Pixel RateIf using a high resolution is important to you, then the Geforce GTX 680 is superior to the GeForce GTX 285 1GB, by far. (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 data (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.