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Radeon HD 5870 vs Radeon HD 6850
Intro
The Radeon HD 5870 features a clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit bus, and uses a 40 nm design. It is comprised of 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.Compare those specifications to the Radeon HD 6850, which features a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 256-bit bus. It also is comprised of 960 SPUs, 48 Texture Address Units, and 32 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 6850 |
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127 Watts |
| Radeon HD 5870 |
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188 Watts |
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Memory Bandwidth
In theory, the Radeon HD 5870 should be just a bit faster than the Radeon HD 6850 in general. (explain)
| Radeon HD 5870 |
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153600 MB/sec |
| Radeon HD 6850 |
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128000 MB/sec |
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Texel Rate
The Radeon HD 5870 will be a lot (approximately 83%) more effective at texture filtering than the Radeon HD 6850. (explain)| Radeon HD 5870 |
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68000 Mtexels/sec |
| Radeon HD 6850 |
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37200 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the Radeon HD 5870 is the winner, though only just barely. (explain)| Radeon HD 5870 |
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27200 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
Radeon HD 5870Amazon.com
Check prices at:
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Radeon HD 6850Amazon.com
Check prices at:
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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.
Specifications
| Model | Radeon HD 5870 | Radeon HD 6850 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | September 23, 2009 | October 2010 |
| Code Name | Cypress XT | Barts Pro |
| Memory | 1024 MB | 1024 MB |
| Core Speed | 850 MHz | 775 MHz |
| Memory Speed | 4800 MHz | 4000 MHz |
| Power (Max TDP) | 188 watts | 127 watts |
| Bandwidth | 153600 MB/sec | 128000 MB/sec |
| Texel Rate | 68000 Mtexels/sec | 37200 Mtexels/sec |
| Pixel Rate | 27200 Mpixels/sec | 24800 Mpixels/sec |
| Unified Shaders | 1600(320x5) | 960 |
| Texture Mapping Units | 80 | 48 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| Fab Process | 40 nm | 40 nm |
| Transistors | 2154 million | 1700 million |
| Bus | PCIe 2.1 x16 | PCIe x16 |
| DirectX Version | DirectX 11 | DirectX 11 |
| OpenGL Version | OpenGL 3.2 | OpenGL 4.1 |
Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 are processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.
Radeon HD 5870Amazon.com
Check prices at:
|
Radeon HD 6850Amazon.com
Check prices at:
|
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.
|
Comments
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