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Radeon HD 6970 vs Radeon HD 7850

Intro

The Radeon HD 6970 comes with a core clock speed of 880 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It is made up of 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon HD 7850, which comes with GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is made up of 1024 SPUs, 64 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 7850 5200 points
Radeon HD 6970 3470 points
Difference: 1730 (50%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon HD 6970 250 Watts
Difference: 120 Watts (92%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6970 should theoretically be a little bit superior to the Radeon HD 7850 overall. (explain)

Radeon HD 6970 176000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 22400 (15%)

Texel Rate

The Radeon HD 6970 is much (more or less 53%) better at AF than the Radeon HD 7850. (explain)

Radeon HD 6970 84480 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 29440 (53%)

Pixel Rate

The Radeon HD 6970 is a small bit (more or less 2%) better at full screen anti-aliasing than the Radeon HD 7850, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6970 28160 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 640 (2%)

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 6970

Amazon.com

Check prices at:

Radeon HD 7850

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 6970 Radeon HD 7850
Manufacturer AMD AMD
Year December 2010 March 2012
Code Name Cayman XT Pitcairn Pro
Memory 2048 MB 2048 MB
Core Speed 880 MHz 860 MHz
Memory Speed 5500 MHz 4800 MHz
Power (Max TDP) 250 watts 130 watts
Bandwidth 176000 MB/sec 153600 MB/sec
Texel Rate 84480 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 28160 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 1536 1024
Texture Mapping Units 96 64
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2640 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon HD 6970

Amazon.com

Check prices at:

Radeon HD 7850

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.

Comments

One Response to “Radeon HD 6970 vs Radeon HD 7850”
Anonymous says:

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