Compare any two graphics cards:
GeForce 8400 GS 512MB vs GeForce 9600 GT 1GB
IntroThe GeForce 8400 GS 512MB uses a 80 nm design. nVidia has set the core frequency at 650 MHz. The DDR2 RAM works at a speed of 400 MHz on this particular model. It features 16 SPUs as well as 8 TAUs and 4 ROPs.
Compare all of that to the GeForce 9600 GT 1GB, which makes use of a 65/55 nm design. nVidia has clocked the core speed at 650 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this specific card. It features 64 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically, the GeForce 9600 GT 1GB should perform much faster than the GeForce 8400 GS 512MB in general. (explain)
Texel RateThe GeForce 9600 GT 1GB should be a lot (approximately 300%) better at texture filtering than the GeForce 8400 GS 512MB. (explain)
Pixel RateThe GeForce 9600 GT 1GB is much (about 300%) better at full screen anti-aliasing than the GeForce 8400 GS 512MB, and also will be capable of handling higher resolutions more effectively. (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 (counted in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.