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Radeon HD 5670 vs Radeon HD 7850

Intro

The Radeon HD 5670 features a core clock speed of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It features 400(80x5) SPUs, 20 TAUs, and 8 Raster Operation Units.

Compare all that to the Radeon HD 7850, which comes with core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs along with 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

The Radeon HD 7850, in theory, should be much faster 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%) better at texture filtering 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 is much (more or less 344%) faster with regards to full screen anti-aliasing than the Radeon HD 5670, and should be capable of handling higher resolutions without losing too much performance. (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

Check prices at:

Radeon HD 7850

Amazon.com

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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 max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon HD 5670

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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