Compare any two graphics cards:
GeForce GTS 450 vs GeForce GTX 550 Ti
IntroThe GeForce GTS 450 uses a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 memory works at a frequency of 902 MHz on this particular card. It features 192 SPUs along with 32 TAUs and 16 Rasterization Operator Units.
Compare those specs to the GeForce GTX 550 Ti, which features a clock frequency of 900 MHz and a GDDR5 memory speed of 1026 MHz. It also uses a 192-bit bus, and uses a 40 nm design. It is comprised of 192 SPUs, 32 TAUs, and 24 Raster Operation Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The GeForce GTX 550 Ti should theoretically be quite a bit faster than the GeForce GTS 450 overall. (explain)
Texel RateThe GeForce GTX 550 Ti will be a small bit (about 15%) more effective at texture filtering than the GeForce GTS 450. (explain)
Pixel RateThe GeForce GTX 550 Ti will be much (approximately 72%) faster with regards to FSAA than the GeForce GTS 450, and capable of handling 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 information (in units of megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.