 |
 |
|
|
|
Radeon HD 6950 vs Radeon HD 7850
Intro
The Radeon HD 6950 has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs as well as 88 TAUs and 32 Rasterization Operator Units.Compare all of that to the Radeon HD 7850, which comes with a clock speed of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
| Radeon HD 7850 |
|
130 Watts |
| Radeon HD 6950 |
|
200 Watts |
|
|
Memory Bandwidth
Theoretically speaking, the Radeon HD 6950 should be a bit faster than the Radeon HD 7850 in general. (explain)
| Radeon HD 6950 |
|
160000 MB/sec |
| Radeon HD 7850 |
|
153600 MB/sec |
|
|
Texel Rate
The Radeon HD 6950 will be a lot (approximately 28%) better at texture filtering than the Radeon HD 7850. (explain)| Radeon HD 6950 |
|
70400 Mtexels/sec |
| Radeon HD 7850 |
|
55040 Mtexels/sec |
|
|
Pixel Rate
The Radeon HD 7850 should be a bit (approximately 8%) faster with regards to anti-aliasing than the Radeon HD 6950, and able to handle higher resolutions better. (explain)| Radeon HD 7850 |
|
27520 Mpixels/sec |
| Radeon HD 6950 |
|
25600 Mpixels/sec |
|
|
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
|
Radeon HD 7850Amazon.com
|
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: Bandwidth is the max amount of information (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that can be applied per 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's 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 is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.
Comments
2 Responses to “Radeon HD 6950 vs Radeon HD 7850”