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Radeon HD 6670 (OEM) 1GB vs Radeon HD 6870

Intro

The Radeon HD 6670 (OEM) 1GB features a GPU clock speed of 800 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare all that to the Radeon HD 6870, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 256-bit bus, and uses a 40 nm design. It is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 1GB 63 Watts
Radeon HD 6870 151 Watts
Difference: 88 Watts (140%)

Memory Bandwidth

The Radeon HD 6870, in theory, should be a lot faster than the Radeon HD 6670 (OEM) 1GB overall. (explain)

Radeon HD 6870 134400 MB/sec
Radeon HD 6670 (OEM) 1GB 64000 MB/sec
Difference: 70400 (110%)

Texel Rate

The Radeon HD 6870 should be much (approximately 163%) more effective at texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)

Radeon HD 6870 50400 Mtexels/sec
Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
Difference: 31200 (163%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6870 is superior to the Radeon HD 6670 (OEM) 1GB, by far. (explain)

Radeon HD 6870 28800 Mpixels/sec
Radeon HD 6670 (OEM) 1GB 6400 Mpixels/sec
Difference: 22400 (350%)

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) 1GB

Amazon.com

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Radeon HD 6870

Amazon.com

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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) 1GB Radeon HD 6870
Manufacturer AMD AMD
Year February 2011 October 2010
Code Name Turks Barts XT
Memory 1024 MB 1024 MB
Core Speed 800 MHz 900 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 63 watts 151 watts
Bandwidth 64000 MB/sec 134400 MB/sec
Texel Rate 19200 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 6400 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 480 1120
Texture Mapping Units 24 56
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 715 million 1700 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 maximum amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the 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 are applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6670 (OEM) 1GB

Amazon.com

Check prices at:

Radeon HD 6870

Amazon.com

Check prices at:

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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