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Radeon HD 6850 vs Radeon HD 6950


Intro

The Radeon HD 6850 makes use of a 40 nm design. AMD has set the core frequency at 775 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this model. It features 960 SPUs along with 48 Texture Address Units and 32 Rasterization Operator Units.

Compare all that to the Radeon HD 6950, which uses a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory works at a speed of 1250 MHz on this particular card. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6950 3240 points
Radeon HD 6850 2395 points
Difference: 845 (35%)

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 be a lot faster than the Radeon HD 6850 in general. (explain)

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

Texel Rate

The Radeon HD 6950 is much (more or less 89%) better at anisotropic 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 running with high levels of AA is important to you, then the Radeon HD 6950 is a better choice, though only just barely. (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

Amazon.com

Radeon HD 6950

Amazon.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

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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 (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6850

Amazon.com

Radeon HD 6950

Amazon.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.

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