Compare any two graphics cards:
GeForce GTX 460 1GB vs Radeon HD 6850
IntroThe GeForce GTX 460 1GB comes with a clock frequency of 675 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It features 336 SPUs, 56 TAUs, and 32 ROPs.
Compare all that to the Radeon HD 6850, which uses a 40 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this particular card. It features 960 SPUs as well as 48 TAUs and 32 Rasterization Operator Units.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Performance-wise, the Radeon HD 6850 should in theory be a small bit superior to the GeForce GTX 460 1GB in general. (explain)
Texel RateThe GeForce GTX 460 1GB should be a small bit (approximately 2%) better at texture filtering than the Radeon HD 6850. (explain)
Pixel RateThe Radeon HD 6850 is a small bit (more or less 15%) more effective at anti-aliasing than the GeForce GTX 460 1GB, and will be capable of handling 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 megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.