Compare any two graphics cards:
GeForce 8400 GS 512MB vs GeForce 9600 GT 1GB
IntroThe GeForce 8400 GS 512MB comes with a GPU core speed of 650 MHz, and the 512 MB of DDR2 RAM is set to run at 400 MHz through a 64-bit bus. It also is comprised of 16 SPUs, 8 TAUs, and 4 Raster Operation Units.
Compare that to the GeForce 9600 GT 1GB, which makes use of a 65/55 nm design. nVidia has set the core frequency at 650 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this specific card. It features 64 SPUs along with 32 TAUs and 16 Rasterization Operator Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically, the GeForce 9600 GT 1GB should be a lot faster than the GeForce 8400 GS 512MB in general. (explain)
Texel RateThe GeForce 9600 GT 1GB is a lot (about 300%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)
Pixel RateIf running with lots of anti-aliasing is important to you, then the GeForce 9600 GT 1GB is superior to the GeForce 8400 GS 512MB, 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 maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.