Compare any two graphics cards:
GeForce 8600 GS (OEM) vs GeForce GTX 650
IntroThe GeForce 8600 GS (OEM) makes use of a 80 nm design. nVidia has clocked the core frequency at 540 MHz. The DDR2 RAM is set to run at a speed of 400 MHz on this model. It features 32 SPUs as well as 16 TAUs and 8 ROPs.
Compare those specifications to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core speed at 1058 MHz. The GDDR5 memory works at a frequency of 1250 MHz on this particular model. It features 384 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the GeForce GTX 650 is 525% faster than the GeForce 8600 GS (OEM) overall, because of its greater bandwidth. (explain)
Texel RateThe GeForce GTX 650 will be quite a bit (about 292%) faster with regards to anisotropic filtering than the GeForce 8600 GS (OEM). (explain)
Pixel RateThe GeForce GTX 650 is a lot (approximately 292%) better at anti-aliasing than the GeForce 8600 GS (OEM), and will be able to handle higher resolutions without slowing down too much. (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 over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 can be applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, 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 maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.