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Radeon HD 6950 vs Radeon HD 7850
Intro
The Radeon HD 6950 comes with a GPU core speed of 800 MHz, and the 1024 MB of GDDR5 RAM runs at 1250 MHz through a 256-bit bus. It also is comprised of 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.Compare all that to the Radeon HD 7850, which features GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also features 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7850 |
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130 Watts |
| Radeon HD 6950 |
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200 Watts |
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Memory Bandwidth
In theory, the Radeon HD 6950 should be 4% quicker than the Radeon HD 7850 overall, due to its greater data rate. (explain)
| Radeon HD 6950 |
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160000 MB/sec |
| Radeon HD 7850 |
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153600 MB/sec |
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Texel Rate
The Radeon HD 6950 will be quite a bit (more or less 28%) faster with regards to anisotropic filtering than the Radeon HD 7850. (explain)| Radeon HD 6950 |
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70400 Mtexels/sec |
| Radeon HD 7850 |
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55040 Mtexels/sec |
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Pixel Rate
If using a high resolution is important to you, then the Radeon HD 7850 is a better choice, though only just barely. (explain)| Radeon HD 7850 |
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27520 Mpixels/sec |
| Radeon HD 6950 |
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25600 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 6950Amazon.com
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Radeon HD 7850Amazon.com
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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 6950 | Radeon HD 7850 |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | December 2010 | March 2012 |
| Code Name | Cayman Pro | Pitcairn Pro |
| Fab Process | 40 nm | 28 nm |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| Memory | 1024 MB | 2048 MB |
| Core Speed | 800 MHz | 860 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1250 MHz (5000 MHz effective) | 1200 MHz (4800 MHz effective) |
| Unified Shaders | 1408 | 1024 |
| Texture Mapping Units | 88 | 64 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 256-bit |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
| Power (Max TDP) | 200 watts | 130 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 160000 MB/sec | 153600 MB/sec |
| Texel Rate | 70400 Mtexels/sec | 55040 Mtexels/sec |
| Pixel Rate | 25600 Mpixels/sec | 27520 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.
Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.
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