Compare any two graphics cards:
GeForce GT 240 GDDR5 vs GeForce GT 430
IntroThe GeForce GT 240 GDDR5 makes use of a 40 nm design. nVidia has clocked the core speed at 550 MHz. The GDDR5 RAM works at a speed of 850 MHz on this particular card. It features 96 SPUs along with 32 TAUs and 8 ROPs.
Compare that to the GeForce GT 430, which has a GPU core clock speed of 700 MHz, and 512 MB of GDDR3 memory running at 900 MHz through a 128-bit bus. It also features 96 Stream Processors, 16 TAUs, and 4 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the GeForce GT 240 GDDR5 is 89% faster than the GeForce GT 430 in general, because of its greater data rate. (explain)
Texel RateThe GeForce GT 240 GDDR5 is a lot (more or less 57%) more effective at texture filtering than the GeForce GT 430. (explain)
Pixel RateThe GeForce GT 240 GDDR5 should be a lot (more or less 57%) better at FSAA than the GeForce GT 430, and will be able to handle higher resolutions better. (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 (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 are processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.