Compare any two graphics cards:
Geforce GTX 780 vs Radeon HD 5870
IntroThe Geforce GTX 780 makes use of a 28 nm design. nVidia has set the core speed at 863 MHz. The GDDR5 memory runs at a frequency of 1502 MHz on this particular model. It features 2304 SPUs as well as 192 Texture Address Units and 48 Rasterization Operator Units.
Compare those specs to the Radeon HD 5870, which comes with GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also features 1600(320x5) Stream Processors, 80 TAUs, and 32 Raster Operation Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The Geforce GTX 780, in theory, should perform much faster than the Radeon HD 5870 in general. (explain)
Texel RateThe Geforce GTX 780 is quite a bit (approximately 144%) faster with regards to texture filtering than the Radeon HD 5870. (explain)
Pixel RateThe Geforce GTX 780 is much (about 52%) better at FSAA than the Radeon HD 5870, and will be capable of handling higher screen 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 max amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a 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. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.