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Radeon HD 5850 vs Radeon HD 6850
Intro
The Radeon HD 5850 features a GPU core speed of 725 MHz, and the 1024 MB of GDDR5 RAM is set to run at 1000 MHz through a 256-bit bus. It also is comprised of 1440(288x5) SPUs, 72 TAUs, and 32 ROPs.Compare those specifications to the Radeon HD 6850, which has a clock frequency of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is made up of 960 SPUs, 48 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6850 |
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127 Watts |
| Radeon HD 5850 |
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151 Watts |
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Memory Bandwidth
Both cards have the exact same memory bandwidth, so theoretically they should have identical performance. (explain)
Texel Rate
The Radeon HD 5850 is a lot (about 40%) better at texture filtering than the Radeon HD 6850. (explain)| Radeon HD 5850 |
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52200 Mtexels/sec |
| Radeon HD 6850 |
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37200 Mtexels/sec |
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Pixel Rate
The Radeon HD 6850 should be a little bit (more or less 7%) faster with regards to AA than the Radeon HD 5850, and also should be capable of handling higher resolutions better. (explain)| Radeon HD 6850 |
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24800 Mpixels/sec |
| Radeon HD 5850 |
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23200 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.
Radeon HD 5850Amazon.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 | Radeon HD 5850 | Radeon HD 6850 |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | September 30, 2009 | October 2010 |
| Code Name | Cypress PRO | Barts Pro |
| Fab Process | 40 nm | 40 nm |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 725 MHz | 775 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1000 MHz | 1000 MHz |
| Unified Shaders | 1440(288x5) | 960 |
| Texture Mapping Units | 72 | 48 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
| Power (Max TDP) | 151 watts | 127 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 128000 MB/sec | 128000 MB/sec |
| Texel Rate | 52200 Mtexels/sec | 37200 Mtexels/sec |
| Pixel Rate | 23200 Mpixels/sec | 24800 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in MB per second) that can be moved over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units by the core clock 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 in one second.
Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.
Comments
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