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Geforce GTX 670 vs Radeon HD 6970

Intro

The Geforce GTX 670 features clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 6970, which comes with GPU clock speed of 880 MHz, and 2048 MB of GDDR5 memory running at 1375 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 670 170 Watts
Radeon HD 6970 250 Watts
Difference: 80 Watts (47%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should theoretically be a small bit superior to the Radeon HD 6970 overall. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 6970 176000 MB/sec
Difference: 16000 (9%)

Texel Rate

The Geforce GTX 670 is much (more or less 21%) better at anisotropic filtering than the Radeon HD 6970. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 6970 84480 Mtexels/sec
Difference: 18000 (21%)

Pixel Rate

If running with a high screen resolution is important to you, then the Geforce GTX 670 is the winner, though only just barely. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 6970 28160 Mpixels/sec
Difference: 1120 (4%)

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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Geforce GTX 670

Amazon.com

Radeon HD 6970

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 Geforce GTX 670 Radeon HD 6970
Manufacturer nVidia AMD
Year May 2012 December 2010
Code Name GK104 Cayman XT
Memory 2048 MB 2048 MB
Core Speed 915 MHz 880 MHz
Memory Speed 6000 MHz 5500 MHz
Power (Max TDP) 170 watts 250 watts
Bandwidth 192000 MB/sec 176000 MB/sec
Texel Rate 102480 Mtexels/sec 84480 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 28160 Mpixels/sec
Unified Shaders 1344 1536
Texture Mapping Units 112 96
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 3540 million 2640 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

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