Compare any two graphics cards:
GeForce 8800 GTS (G92) vs Radeon HD 5770
IntroThe GeForce 8800 GTS (G92) makes use of a 65 nm design. nVidia has set the core speed at 650 MHz. The GDDR3 RAM runs at a speed of 970 MHz on this particular model. It features 128 SPUs as well as 64 Texture Address Units and 16 ROPs.
Compare that to the Radeon HD 5770, which uses a 40 nm design. AMD has set the core frequency at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Performance-wise, the Radeon HD 5770 should theoretically be a lot superior to the GeForce 8800 GTS (G92) overall. (explain)
Texel RateThe GeForce 8800 GTS (G92) will be quite a bit (more or less 22%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)
Pixel RateIf running with a high screen resolution is important to you, then the Radeon HD 5770 is superior to the GeForce 8800 GTS (G92), 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 (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 interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.