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Radeon HD 6670 (OEM) vs Radeon HD 6950


The Radeon HD 6670 (OEM) comes with a core clock speed of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Compare all that to the Radeon HD 6950, which features GPU core speed of 800 MHz, and 1024 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 1408 SPUs, 88 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 6950 200 Watts
Difference: 137 Watts (217%)

Memory Bandwidth

In theory, the Radeon HD 6950 will be 150% faster than the Radeon HD 6670 (OEM) in general, because of its higher data rate. (explain)

Radeon HD 6950 160000 MB/sec
Radeon HD 6670 (OEM) 64000 MB/sec
Difference: 96000 (150%)

Texel Rate

The Radeon HD 6950 should be much (more or less 267%) better at texture filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 6950 70400 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 51200 (267%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6950 is the winner, and very much so. (explain)

Radeon HD 6950 25600 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 19200 (300%)

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 6670 (OEM)

Radeon HD 6950

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.


Display Specifications

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Model Radeon HD 6670 (OEM) Radeon HD 6950
Manufacturer AMD AMD
Year February 2011 December 2010
Code Name Turks Cayman Pro
Memory 512 MB 1024 MB
Core Speed 800 MHz 800 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 63 watts 200 watts
Bandwidth 64000 MB/sec 160000 MB/sec
Texel Rate 19200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 6400 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 480 1408
Texture Mapping Units 24 88
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 715 million 2640 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the ability to get to the max fill rate.


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