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Radeon HD 6670 (OEM) vs Radeon HD 7970

Intro

The Radeon HD 6670 (OEM) has a GPU clock speed of 800 MHz, and the 512 MB of GDDR5 memory runs at 1000 MHz through a 128-bit bus. It also features 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

Compare those specs to the Radeon HD 7970, which comes with a core clock speed of 925 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 384-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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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 7970 8225 points
Radeon HD 6670 (OEM) 1120 points
Difference: 7105 (634%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 7970 250 Watts
Difference: 187 Watts (297%)

Memory Bandwidth

The Radeon HD 7970 should theoretically perform a lot faster than the Radeon HD 6670 (OEM) overall. (explain)

Radeon HD 7970 264000 MB/sec
Radeon HD 6670 (OEM) 64000 MB/sec
Difference: 200000 (313%)

Texel Rate

The Radeon HD 7970 will be much (approximately 517%) better at anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 7970 118400 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 99200 (517%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7970 is a better choice, by a large margin. (explain)

Radeon HD 7970 29600 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 23200 (363%)

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

Check prices at:

Radeon HD 7970

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.

Specifications

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Model Radeon HD 6670 (OEM) Radeon HD 7970
Manufacturer AMD AMD
Year February 2011 January 2012
Code Name Turks Tahiti XT
Memory 512 MB 3072 MB
Core Speed 800 MHz 925 MHz
Memory Speed 4000 MHz 5500 MHz
Power (Max TDP) 63 watts 250 watts
Bandwidth 64000 MB/sec 264000 MB/sec
Texel Rate 19200 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 6400 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 480 2048
Texture Mapping Units 24 128
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 715 million 4313 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the 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 number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 video 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 colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - 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

Check prices at:

Radeon HD 7970

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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