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Radeon HD 6950 vs Radeon HD 7850
Intro
The Radeon HD 6950 has clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 RAM. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.Compare that to the Radeon HD 7850, which features clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs along with 64 TAUs and 32 ROPs.
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
The Radeon HD 6950 should theoretically perform a little bit faster than the Radeon HD 7850 in general. (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 should be a lot (about 28%) more effective at 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
The Radeon HD 7850 should be just a bit (about 8%) more effective at anti-aliasing than the Radeon HD 6950, and able to handle higher resolutions more effectively. (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 largest amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once 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 anti-aliasing, 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 amount of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum amount of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.
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