Compare any two graphics cards:
GeForce 8400 GS 512MB vs GeForce GT 430 (OEM)
IntroThe GeForce 8400 GS 512MB features a GPU core clock speed of 650 MHz, and the 512 MB of DDR2 memory is set to run at 400 MHz through a 64-bit bus. It also features 16 SPUs, 8 TAUs, and 4 ROPs.
Compare those specifications to the GeForce GT 430 (OEM), which has GPU clock speed of 700 MHz, and 2048 MB of GDDR3 RAM running at 900 MHz through a 128-bit bus. It also is comprised of 96 Stream Processors, 16 TAUs, and 4 Raster Operation Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the GeForce GT 430 (OEM) should be 350% faster than the GeForce 8400 GS 512MB overall, due to its greater bandwidth. (explain)
Texel RateThe GeForce GT 430 (OEM) should be a lot (approximately 115%) better at AF than the GeForce 8400 GS 512MB. (explain)
Pixel RateThe GeForce GT 430 (OEM) will be a little bit (approximately 8%) better at FSAA than the GeForce 8400 GS 512MB, and also capable of handling higher resolutions while still performing well. (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 information (measured in MB per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. 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 lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.