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Radeon HD 5850 vs Radeon HD 6670 (OEM)

Intro

The Radeon HD 5850 has a core clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It features 1440(288x5) SPUs, 72 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon HD 6670 (OEM), which features a clock frequency of 800 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit bus, and uses a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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(No game benchmarks for this combination yet.)

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

The Radeon HD 5850 should in theory be quite a bit faster than the Radeon HD 6670 (OEM) overall. (explain)

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

Texel Rate

The Radeon HD 5850 will be a lot (about 172%) more effective at 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

The Radeon HD 5850 should be quite a bit (approximately 263%) better at AA than the Radeon HD 6670 (OEM), and also should be able to handle higher screen resolutions without losing too much performance. (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

Display 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
Fab Process 40 nm 40 nm
Bus PCIe 2.1 x16 PCIe 2.1 x16
Memory 1024 MB 512 MB
Core Speed 725 MHz 800 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 4000 MHz 4000 MHz
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
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1
Power (Max TDP) 151 watts 63 watts
Shader Model 5.0 5.0
Bandwidth 128000 MB/sec 64000 MB/sec
Texel Rate 52200 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 23200 Mpixels/sec 6400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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