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Radeon HD 6670 (OEM) vs Radeon HD 6950


Intro

The Radeon HD 6670 (OEM) features a GPU core clock speed of 800 MHz, and the 512 MB of GDDR5 RAM is set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the Radeon HD 6950, which comes with clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1024 MB of GDDR5 memory. It features 1408 SPUs along with 88 TAUs 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 6950 3240 points
Radeon HD 6670 (OEM) 1120 points
Difference: 2120 (189%)

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

The Radeon HD 6950 should theoretically perform quite a bit faster than the Radeon HD 6670 (OEM) overall. (explain)

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

Texel Rate

The Radeon HD 6950 will be a lot (approximately 267%) better at anisotropic 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

The Radeon HD 6950 should be quite a bit (about 300%) better at anti-aliasing than the Radeon HD 6670 (OEM), and also capable of handling higher screen resolutions while still performing well. (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)

Amazon.com

Radeon HD 6950

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 6670 (OEM)

Amazon.com

Radeon HD 6950

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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