Compare any two graphics cards:
GeForce 8400 GS 512MB vs GeForce GT 430 (OEM)
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 frequency of 400 MHz on this particular card. It features 16 SPUs along with 8 Texture Address Units and 4 ROPs.
Compare all of that to the GeForce GT 430 (OEM), which comes with a core clock frequency of 700 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It is comprised of 96 SPUs, 16 TAUs, and 4 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the GeForce GT 430 (OEM) will be 350% faster than the GeForce 8400 GS 512MB overall, because of its higher bandwidth. (explain)
Texel RateThe GeForce GT 430 (OEM) should be much (more or less 115%) better at AF than the GeForce 8400 GS 512MB. (explain)
Pixel RateThe GeForce GT 430 (OEM) is just a bit (approximately 8%) faster with regards to anti-aliasing than the GeForce 8400 GS 512MB, and able to handle higher screen 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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.