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Radeon HD 6970 vs Radeon HD 7850
Intro
The Radeon HD 6970 has a GPU core clock speed of 880 MHz, and the 2048 MB of GDDR5 memory is set to run at 1375 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 ROPs.Compare that to the Radeon HD 7850, which features core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7850 |
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130 Watts |
| Radeon HD 6970 |
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250 Watts |
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Memory Bandwidth
Performance-wise, the Radeon HD 6970 should in theory be a little bit superior to the Radeon HD 7850 overall. (explain)
| Radeon HD 6970 |
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176000 MB/sec |
| Radeon HD 7850 |
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153600 MB/sec |
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Texel Rate
The Radeon HD 6970 should be much (approximately 53%) better at anisotropic filtering than the Radeon HD 7850. (explain)| Radeon HD 6970 |
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84480 Mtexels/sec |
| Radeon HD 7850 |
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55040 Mtexels/sec |
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Pixel Rate
The Radeon HD 6970 should be a small bit (more or less 2%) better at anti-aliasing than the Radeon HD 7850, and should be capable of handling higher screen resolutions without losing too much performance. (explain)| Radeon HD 6970 |
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28160 Mpixels/sec |
| Radeon HD 7850 |
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27520 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 6970Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Radeon HD 7850Amazon.com
Other US-based stores
Amazon.co.uk
Amazon.de
Amazon.fr
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Specifications
| Model | Radeon HD 6970 | Radeon HD 7850 |
|---|---|---|
| Manufacturer | ATi | ATi |
| Year | December 2010 | March 2012 |
| Code Name | Cayman XT | Pitcairn Pro |
| Fab Process | 40 nm | 28 nm |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| Memory | 2048 MB | 2048 MB |
| Core Speed | 880 MHz | 860 MHz |
| Shader Speed | N/A MHz | (N/A) MHz |
| Memory Speed | 1375 MHz (5500 MHz effective) | 1200 MHz (4800 MHz effective) |
| Unified Shaders | 1536 | 1024 |
| Texture Mapping Units | 96 | 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) | 250 watts | 130 watts |
| Shader Model | 5.0 | 5.0 |
| Bandwidth | 176000 MB/sec | 153600 MB/sec |
| Texel Rate | 84480 Mtexels/sec | 55040 Mtexels/sec |
| Pixel Rate | 28160 Mpixels/sec | 27520 Mpixels/sec |
Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 are applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.
Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its 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 the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.
Comments
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