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Radeon HD 5870 vs Radeon HD 6850
Intro
The Radeon HD 5870 comes with core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 RAM. It features 1600(320x5) SPUs as well as 80 TAUs and 32 ROPs.Compare all of that to the Radeon HD 6850, which has a core clock speed of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 960 SPUs, 48 Texture Address Units, 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 5870 |
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188 Watts |
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Memory Bandwidth
The Radeon HD 5870, in theory, should perform a little 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 is much (approximately 83%) better at AF 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 lots of anti-aliasing is important to you, then the Radeon HD 5870 is the winner, but only just. (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 max amount of information (measured in MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max 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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