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Radeon HD 6970 vs Radeon HD 7970

Intro

The Radeon HD 6970 comes with a clock frequency of 880 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 256-bit memory bus, and uses a 40 nm design. It is comprised of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 7970, which has core speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the Radeon HD 7970 should be much faster than the Radeon HD 6970 in general. (explain)

Radeon HD 7970 264000 MB/sec
Radeon HD 6970 176000 MB/sec
Difference: 88000 (50%)

Texel Rate

The Radeon HD 7970 will be much (more or less 40%) faster with regards to texture filtering than the Radeon HD 6970. (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon HD 6970 84480 Mtexels/sec
Difference: 33920 (40%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7970 is the winner, though only just barely. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon HD 6970 28160 Mpixels/sec
Difference: 1440 (5%)

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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 6970

Amazon.com

Other US-based stores

Radeon HD 7970

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 6970 Radeon HD 7970
Manufacturer ATi ATi
Year December 2010 January 2012
Code Name Cayman XT Tahiti XT
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 2048 MB 3072 MB
Core Speed 880 MHz 925 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1375 MHz (5500 MHz effective) 1375 MHz (5500 MHz effective)
Unified Shaders 1536 2048
Texture Mapping Units 96 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 384-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2
Power (Max TDP) 250 watts 250 watts
Shader Model 5.0 5.0
Bandwidth 176000 MB/sec 264000 MB/sec
Texel Rate 84480 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 29600 Mpixels/sec

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Comments

4 Responses to “Radeon HD 6970 vs Radeon HD 7970”
timmeh says:
lol guys, get a 6970, its a lot cheaper
Some Dude says:
Do want! But still, then I have to invest in a new Mobo, and then it would be about double the price of a 6990

6990 > 7970

vlcrpt[0]r says:
2x 6970 > 6990 > 7970

But they are so loud :S

LunaticGTX says:
get 7970 and replace the cooler with arctic cooler 7970
cheaper than plus 2 or extreme

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