Compare any two graphics cards:
GeForce GT 440 3GB vs Radeon HD 5570
IntroThe GeForce GT 440 3GB features a core clock frequency of 594 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 192-bit bus, and makes use of a 40 nm design. It features 144 SPUs, 24 TAUs, and 24 Raster Operation Units.
Compare that to the Radeon HD 5570, which uses a 40 nm design. AMD has set the core speed at 650 MHz. The DDR3 RAM runs at a frequency of 900 MHz on this particular model. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the GeForce GT 440 3GB will be 50% quicker than the Radeon HD 5570 overall, because of its greater data rate. (explain)
Texel RateThe GeForce GT 440 3GB will be just a bit (approximately 10%) faster with regards to anisotropic filtering than the Radeon HD 5570. (explain)
Pixel RateIf using a high screen resolution is important to you, then the GeForce GT 440 3GB is superior to the Radeon HD 5570, by far. (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 data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of 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 clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. 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 quite a few 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.