Compare any two graphics cards:
GeForce 8600 GT 512MB GDDR3 vs GeForce 9500 GT 1GB GDDR3
IntroThe GeForce 8600 GT 512MB GDDR3 has a GPU core clock speed of 540 MHz, and the 512 MB of GDDR3 memory runs at 700 MHz through a 128-bit bus. It also is made up of 32 Stream Processors, 16 Texture Address Units, and 8 ROPs.
Compare those specifications to the GeForce 9500 GT 1GB GDDR3, which uses a 55 nm design. nVidia has set the core speed at 550 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this model. It features 32 SPUs as well as 16 Texture Address Units and 8 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce 9500 GT 1GB GDDR3 should in theory be a bit faster than the GeForce 8600 GT 512MB GDDR3 in general. (explain)
Texel RateThe GeForce 9500 GT 1GB GDDR3 should be just a bit (approximately 2%) faster with regards to texture filtering than the GeForce 8600 GT 512MB GDDR3. (explain)
Pixel RateIf running with lots of anti-aliasing is important to you, then the GeForce 9500 GT 1GB GDDR3 is a better choice, 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.
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 (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock 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 per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.