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Radeon HD 6950 2GB vs Radeon HD 7950 3GB
Intro
The Radeon HD 6950 2GB has a core clock frequency of 800 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 1408 SPUs, 88 Texture Address Units, and 32 ROPs.Compare all that to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Both cards have the same power consumption.Memory Bandwidth
The Radeon HD 7950 3GB should in theory be a lot faster than the Radeon HD 6950 2GB overall. (explain)
| Radeon HD 7950 3GB |
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240000 MB/sec |
| Radeon HD 6950 2GB |
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160000 MB/sec |
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Texel Rate
The Radeon HD 7950 3GB will be quite a bit (more or less 27%) faster with regards to AF than the Radeon HD 6950 2GB. (explain)| Radeon HD 7950 3GB |
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89600 Mtexels/sec |
| Radeon HD 6950 2GB |
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70400 Mtexels/sec |
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Pixel Rate
Both cards have the exact same pixel fill rate, so in theory they should be equally good at at FSAA, and be able to handle the same resolutions. (explain)
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 6950 2GBAmazon.com
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Radeon HD 7950 3GBAmazon.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 2GB | Radeon HD 7950 3GB |
|---|---|---|
| Manufacturer | AMD | AMD |
| Year | December 2010 | January 2012 |
| Code Name | Cayman Pro | Tahiti Pro |
| Memory | 2048 MB | 3072 MB |
| Core Speed | 800 MHz | 800 MHz |
| Memory Speed | 5000 MHz | 5000 MHz |
| Power (Max TDP) | 200 watts | 200 watts |
| Bandwidth | 160000 MB/sec | 240000 MB/sec |
| Texel Rate | 70400 Mtexels/sec | 89600 Mtexels/sec |
| Pixel Rate | 25600 Mpixels/sec | 25600 Mpixels/sec |
| Unified Shaders | 1408 | 1792 |
| Texture Mapping Units | 88 | 112 |
| Render Output Units | 32 | 32 |
| Bus Type | GDDR5 | GDDR5 |
| Bus Width | 256-bit | 384-bit |
| Fab Process | 40 nm | 28 nm |
| Transistors | 2640 million | 4313 million |
| Bus | PCIe x16 | PCIe 3.0 x16 |
| DirectX Version | DirectX 11 | DirectX 11.1 |
| OpenGL Version | OpenGL 4.1 | OpenGL 4.2 |
Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum amount 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 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 per second.
Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.
Radeon HD 6950 2GBAmazon.com
Check prices at:
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Radeon HD 7950 3GBAmazon.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.
|
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