Compare any two graphics cards:
GeForce GT 220 GDDR3 vs Radeon HD 5570
IntroThe GeForce GT 220 GDDR3 comes with a GPU core speed of 625 MHz, and the 512 MB of GDDR3 RAM runs at 1012 MHz through a 128-bit bus. It also is made up of 48 SPUs, 16 TAUs, and 8 Raster Operation Units.
Compare those specifications to the Radeon HD 5570, which comes with a clock frequency of 650 MHz and a DDR3 memory speed of 900 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 400(80x5) SPUs, 20 TAUs, and 8 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the GeForce GT 220 GDDR3 should be a bit faster than the Radeon HD 5570 overall. (explain)
Texel RateThe Radeon HD 5570 is quite a bit (approximately 30%) more effective at anisotropic filtering than the GeForce GT 220 GDDR3. (explain)
Pixel RateThe Radeon HD 5570 will be just a bit (approximately 4%) more effective at FSAA than the GeForce GT 220 GDDR3, and will be able to handle higher resolutions more effectively. (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 (counted in MB per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum 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 better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.