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Radeon HD 5670 vs Radeon HD 7850

Intro

The Radeon HD 5670 has a GPU clock speed of 775 MHz, and the 1024 MB of GDDR5 RAM runs at 1000 MHz through a 128-bit bus. It also is made up of 400(80x5) Stream Processors, 20 TAUs, and 8 ROPs.

Compare those specifications to the Radeon HD 7850, which comes with GPU core speed of 860 MHz, and 2048 MB of GDDR5 RAM running at 1200 MHz through a 256-bit bus. It also is made up of 1024 SPUs, 64 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 7850 130 Watts
Difference: 69 Watts (113%)

Memory Bandwidth

Performance-wise, the Radeon HD 7850 should theoretically be quite a bit better than the Radeon HD 5670 overall. (explain)

Radeon HD 7850 153600 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 89600 (140%)

Texel Rate

The Radeon HD 7850 is a lot (about 255%) more effective at AF than the Radeon HD 5670. (explain)

Radeon HD 7850 55040 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 39540 (255%)

Pixel Rate

The Radeon HD 7850 should be much (about 344%) more effective at FSAA than the Radeon HD 5670, and capable of handling higher resolutions more effectively. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 21320 (344%)

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 5670

Amazon.com

Radeon HD 7850

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 5670 Radeon HD 7850
Manufacturer AMD AMD
Year January 14, 2010 March 2012
Code Name Redwood XT Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 775 MHz 860 MHz
Memory Speed 4000 MHz 4800 MHz
Power (Max TDP) 61 watts 130 watts
Bandwidth 64000 MB/sec 153600 MB/sec
Texel Rate 15500 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 6200 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 400(80x5) 1024
Texture Mapping Units 20 64
Render Output Units 8 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 627 million 2800 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 3.2 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better 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 the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5670

Amazon.com

Radeon HD 7850

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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