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Radeon HD 6970 vs Radeon HD 7950


Intro

The Radeon HD 6970 features clock speeds of 880 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 7950, which features a core clock frequency of 800 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 384-bit memory bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

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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 7950 7731 points
Radeon HD 6970 3470 points
Difference: 4261 (123%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Radeon HD 7950 should perform a lot faster than the Radeon HD 6970 in general. (explain)

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

Texel Rate

The Radeon HD 7950 will be just a bit (approximately 6%) faster with regards to anisotropic filtering than the Radeon HD 6970. (explain)

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

Pixel Rate

The Radeon HD 6970 should be a little bit (approximately 10%) better at anti-aliasing than the Radeon HD 7950, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 6970 28160 Mpixels/sec
Radeon HD 7950 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

Radeon HD 7950

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 6970 Radeon HD 7950
Manufacturer AMD AMD
Year December 2010 January 2012
Code Name Cayman XT Tahiti Pro
Memory 2048 MB 1536 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 over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video 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 most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of 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 output rate is also dependant on many 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

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Radeon HD 6970

Amazon.com

Radeon HD 7950

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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