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Radeon HD 5850 vs Radeon HD 6670 (OEM)

Intro

The Radeon HD 5850 uses a 40 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this specific model. It features 1440(288x5) SPUs along with 72 TAUs and 32 Rasterization Operator Units.

Compare that to the Radeon HD 6670 (OEM), which uses a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 memory is set to run at a speed of 1000 MHz on this specific card. It features 480 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 5850 151 Watts
Difference: 88 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5850 should perform much faster than the Radeon HD 6670 (OEM) in general. (explain)

Radeon HD 5850 128000 MB/sec
Radeon HD 6670 (OEM) 64000 MB/sec
Difference: 64000 (100%)

Texel Rate

The Radeon HD 5850 is much (about 172%) faster with regards to anisotropic filtering than the Radeon HD 6670 (OEM). (explain)

Radeon HD 5850 52200 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 33000 (172%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5850 is the winner, by far. (explain)

Radeon HD 5850 23200 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 16800 (263%)

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

Display Prices

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Radeon HD 5850

Amazon.com

Radeon HD 6670 (OEM)

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 5850 Radeon HD 6670 (OEM)
Manufacturer AMD AMD
Year September 30, 2009 February 2011
Code Name Cypress PRO Turks
Memory 1024 MB 512 MB
Core Speed 725 MHz 800 MHz
Memory Speed 4000 MHz 4000 MHz
Power (Max TDP) 151 watts 63 watts
Bandwidth 128000 MB/sec 64000 MB/sec
Texel Rate 52200 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 23200 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 1440(288x5) 480
Texture Mapping Units 72 24
Render Output Units 32 8
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 2154 million 715 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum 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 its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core clock speed. 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 is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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