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Radeon HD 6950 vs Radeon HD 7850
Intro
The Radeon HD 6950 has a clock speed of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is made up of 1408 SPUs, 88 Texture Address Units, and 32 ROPs.Compare those specs to the Radeon HD 7850, which has a core clock speed of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1024 SPUs, 64 Texture Address Units, 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
Theoretically, the Radeon HD 6950 should perform just a 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 will be much (approximately 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 superior to the Radeon HD 6950, but only just. (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
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 6950Amazon.com
Other US-based stores
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Radeon HD 7850Amazon.com
Other US-based stores
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Specifications
| Model | Radeon HD 6950 | Radeon HD 7850 |
|---|---|---|
| Manufacturer | ATi | ATi |
| 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: Bandwidth is the max amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated 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 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 most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.
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