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Radeon HD 6970 vs Radeon HD 7950 3GB

Intro

The Radeon HD 6970 has a GPU core speed of 880 MHz, and the 2048 MB of GDDR5 memory runs at 1375 MHz through a 256-bit bus. It also features 1536 SPUs, 96 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 7950 3GB, which features core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB 200 Watts
Radeon HD 6970 250 Watts
Difference: 50 Watts (25%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB should be quite a bit faster than the Radeon HD 6970 in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon HD 6970 176000 MB/sec
Difference: 64000 (36%)

Texel Rate

The Radeon HD 7950 3GB will be a small bit (approximately 6%) faster with regards to AF than the Radeon HD 6970. (explain)

Radeon HD 7950 3GB 89600 Mtexels/sec
Radeon HD 6970 84480 Mtexels/sec
Difference: 5120 (6%)

Pixel Rate

The Radeon HD 6970 is just a bit (approximately 10%) more effective at full screen anti-aliasing than the Radeon HD 7950 3GB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6970 28160 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 2560 (10%)

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 6970

Amazon.com

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Radeon HD 7950 3GB

Amazon.com

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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 6970 Radeon HD 7950 3GB
Manufacturer AMD AMD
Year December 2010 January 2012
Code Name Cayman XT Tahiti Pro
Memory 2048 MB 3072 MB
Core Speed 880 MHz 800 MHz
Memory Speed 5500 MHz 5000 MHz
Power (Max TDP) 250 watts 200 watts
Bandwidth 176000 MB/sec 240000 MB/sec
Texel Rate 84480 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 1536 1792
Texture Mapping Units 96 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video 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 colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 6970

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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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