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Radeon HD 5670 vs Radeon HD 7850


Intro

The Radeon HD 5670 has core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 400(80x5) SPUs along with 20 TAUs and 8 ROPs.

Compare those specifications to the Radeon HD 7850, which uses a 28 nm design. AMD has set the core speed at 860 MHz. The GDDR5 RAM runs at a frequency of 1200 MHz on this particular model. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator 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

Theoretically speaking, the Radeon HD 7850 should be 140% faster than the Radeon HD 5670 overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 7850 will be much (approximately 255%) faster with regards to anisotropic filtering than the Radeon HD 5670. (explain)

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

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 7850 is superior to the Radeon HD 5670, and very much so. (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: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock 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 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 max 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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