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Radeon HD 5970 vs Radeon HD 6950

Intro

The Radeon HD 5970 uses a 40 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this model. It features 1600 SPUs along with 160 TAUs and 64 ROPs.

Compare those specs to the Radeon HD 6950, which makes use of a 40 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a speed of 1250 MHz on this specific card. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon HD 5970 is 60% quicker than the Radeon HD 6950 in general, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 5970 should be quite a bit (approximately 230%) faster with regards to anisotropic filtering than the Radeon HD 6950. (explain)

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

Pixel Rate

The Radeon HD 5970 will be much (more or less 263%) faster with regards to anti-aliasing than the Radeon HD 6950, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 5970 92800 Mpixels/sec
Radeon HD 6950 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

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
Manufacturer AMD AMD
Year November 2009 December 2010
Code Name Hemlock XT Cayman Pro
Memory 1024 MB (x2) 1024 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 information (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 5970

Amazon.com

Check prices at:

Radeon HD 6950

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.

Comments

One Response to “Radeon HD 5970 vs Radeon HD 6950”
VDT says:

thanks for the informations!!!

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