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Radeon HD 5970 vs Radeon HD 6950 2GB

Intro

The Radeon HD 5970 makes use of a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory works at a speed of 1000 MHz on this specific model. It features 1600 SPUs as well as 160 Texture Address Units and 64 ROPs.

Compare all of that to the Radeon HD 6950 2GB, which comes with GPU clock speed of 800 MHz, and 2048 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB 200 Watts
Radeon HD 5970 294 Watts
Difference: 94 Watts (47%)

Memory Bandwidth

Theoretically, the Radeon HD 5970 should be quite a bit faster than the Radeon HD 6950 2GB in general. (explain)

Radeon HD 5970 256000 MB/sec
Radeon HD 6950 2GB 160000 MB/sec
Difference: 96000 (60%)

Texel Rate

The Radeon HD 5970 will be quite a bit (more or less 230%) better at AF than the Radeon HD 6950 2GB. (explain)

Radeon HD 5970 232000 Mtexels/sec
Radeon HD 6950 2GB 70400 Mtexels/sec
Difference: 161600 (230%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5970 is superior to the Radeon HD 6950 2GB, by a large margin. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 6950 2GB 25600 Mpixels/sec
Difference: 67200 (263%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 6950 2GB

Amazon.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.

Specifications

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Model Radeon HD 5970 Radeon HD 6950 2GB
Manufacturer AMD AMD
Year November 2009 December 2010
Code Name Hemlock XT Cayman Pro
Memory 1024 MB (x2) 2048 MB
Core Speed 725 MHz (x2) 800 MHz
Memory Speed 4000 MHz (x2) 5000 MHz
Power (Max TDP) 294 watts 200 watts
Bandwidth 256000 MB/sec 160000 MB/sec
Texel Rate 232000 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 92800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1600 (x2) 1408
Texture Mapping Units 160 (x2) 88
Render Output Units 64 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 40 nm 40 nm
Transistors 2154 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 largest amount of information (in units of MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 6950 2GB

Amazon.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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