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Radeon HD 6850 vs Radeon HD 6950


The Radeon HD 6850 uses a 40 nm design. AMD has clocked the core speed at 775 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this particular card. It features 960 SPUs as well as 48 TAUs and 32 ROPs.

Compare all that to the Radeon HD 6950, which comes with GPU clock speed of 800 MHz, and 1024 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also is made up of 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon HD 6950 200 Watts
Difference: 73 Watts (57%)

Memory Bandwidth

In theory, the Radeon HD 6950 should perform a lot faster than the Radeon HD 6850 overall. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The Radeon HD 6950 will be quite a bit (more or less 89%) better at texture filtering than the Radeon HD 6850. (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 33200 (89%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6950 is a better choice, but it probably won't make a huge difference. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 800 (3%)

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

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Radeon HD 6850

Radeon HD 6950

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.


Display Specifications

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Model Radeon HD 6850 Radeon HD 6950
Manufacturer AMD AMD
Year October 2010 December 2010
Code Name Barts Pro Cayman Pro
Memory 1024 MB 1024 MB
Core Speed 775 MHz 800 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 127 watts 200 watts
Bandwidth 128000 MB/sec 160000 MB/sec
Texel Rate 37200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 960 1408
Texture Mapping Units 48 88
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1700 million 2640 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.


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