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Radeon HD 5970 vs Radeon HD 6950 2GB

Intro

The Radeon HD 5970 has a clock frequency of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It features 1600 SPUs, 160 TAUs, and 64 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which features GPU core speed of 800 MHz, and 2048 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 1408 SPUs, 88 Texture Address Units, and 32 Raster Operation Units.

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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

As far as performance goes, the Radeon HD 5970 should in theory be much superior to the Radeon HD 6950 2GB overall. (explain)

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

Texel Rate

The Radeon HD 5970 is quite a bit (approximately 230%) better at texture filtering 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 running with a high screen resolution is important to you, then the Radeon HD 5970 is the winner, 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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it must 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated 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 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 amount of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential 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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