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GeForce GTX 480 vs Radeon HD 6850
Intro
The GeForce GTX 480 comes with a core clock frequency of 700 MHz and a GDDR5 memory speed of 924 MHz. It also uses a 384-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 60 TAUs, and 48 ROPs.Compare all of that to the Radeon HD 6850, which makes use of a 40 nm design. ATi has set the core speed at 775 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular card. It features 960 SPUs as well as 48 TAUs and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6850 |
|
127 Watts |
| GeForce GTX 480 |
|
250 Watts |
|
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Memory Bandwidth
The GeForce GTX 480, in theory, should be much faster than the Radeon HD 6850 in general. (explain)
| GeForce GTX 480 |
|
177408 MB/sec |
| Radeon HD 6850 |
|
128000 MB/sec |
|
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Texel Rate
The GeForce GTX 480 will be a small bit (approximately 13%) faster with regards to AF than the Radeon HD 6850. (explain)| GeForce GTX 480 |
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42000 Mtexels/sec |
| Radeon HD 6850 |
|
37200 Mtexels/sec |
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Pixel Rate
The GeForce GTX 480 should be much (about 35%) better at FSAA than the Radeon HD 6850, and also able to handle higher resolutions better. (explain)| GeForce GTX 480 |
|
33600 Mpixels/sec |
| Radeon HD 6850 |
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24800 Mpixels/sec |
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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.
Price Comparison
Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
GeForce GTX 480Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 6850Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | GeForce GTX 480 | Radeon HD 6850 |
|---|---|---|
| Manufacturer | nVidia | ATi |
| Year | March 2010 | October 2010 |
| Code Name | GF100 | Barts Pro |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe x16 | PCIe x16 |
| Memory | 1536 MB | 1024 MB |
| Core Speed | 700 MHz | 775 MHz |
| Shader Speed | 1401 MHz | (N/A) MHz |
| Memory Speed | 924 MHz (3696 MHz effective) | 1000 MHz (4000 MHz effective) |
| Unified Shaders | 480 | 960 |
| Texture Mapping Units | 60 | 48 |
| Render Output Units | 48 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 384-bit | 256-bit |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.1 |
| Power (Max TDP) | 250 watts | 127 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 177408 MB/sec | 128000 MB/sec |
| Texel Rate | 42000 Mtexels/sec | 37200 Mtexels/sec |
| Pixel Rate | 33600 Mpixels/sec | 24800 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
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