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Radeon HD 6850 vs Radeon HD 7850

Intro

The Radeon HD 6850 comes with a GPU core clock speed of 775 MHz, and the 1024 MB of GDDR5 memory is set to run at 1000 MHz through a 256-bit bus. It also features 960 Stream Processors, 48 TAUs, and 32 ROPs.

Compare that to the Radeon HD 7850, which uses a 28 nm design. AMD has set the core speed at 860 MHz. The GDDR5 memory works at a speed of 1200 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator 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 6850 2395 points
Difference: 2805 (117%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
Radeon HD 7850 130 Watts
Difference: 3 Watts (2%)

Memory Bandwidth

The Radeon HD 7850 should theoretically be a bit faster than the Radeon HD 6850 overall. (explain)

Radeon HD 7850 153600 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 25600 (20%)

Texel Rate

The Radeon HD 7850 should be much (more or less 48%) faster with regards to AF than the Radeon HD 6850. (explain)

Radeon HD 7850 55040 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 17840 (48%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7850 is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 2720 (11%)

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 6850

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 6850 Radeon HD 7850
Manufacturer AMD AMD
Year October 2010 March 2012
Code Name Barts Pro Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 775 MHz 860 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 127 watts 130 watts
Bandwidth 128000 MB/sec 153600 MB/sec
Texel Rate 37200 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 24800 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 960 1024
Texture Mapping Units 48 64
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1700 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: Bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many 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 6850

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.

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