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Radeon HD 5670 vs Radeon HD 6750 1GB

Intro

The Radeon HD 5670 comes with 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 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this specific card. It features 720 SPUs along with 36 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5670 61 Watts
Radeon HD 6750 1GB 86 Watts
Difference: 25 Watts (41%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The Radeon HD 6750 1GB is a lot (more or less 68%) more effective at AF than the Radeon HD 5670. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 10600 (68%)

Pixel Rate

The Radeon HD 6750 1GB is much (approximately 87%) more effective at anti-aliasing than the Radeon HD 5670, and also able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 5400 (87%)

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 6750 1GB

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.

Specifications

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Model Radeon HD 5670 Radeon HD 6750 1GB
Manufacturer AMD AMD
Year January 14, 2010 January 2011
Code Name Redwood XT Juniper Pro
Memory 1024 MB 1024 MB
Core Speed 775 MHz 725 MHz
Memory Speed 4000 MHz 4000 MHz
Power (Max TDP) 61 watts 86 watts
Bandwidth 64000 MB/sec 64000 MB/sec
Texel Rate 15500 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 6200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 400(80x5) 720
Texture Mapping Units 20 36
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 627 million 1040 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5670

Amazon.com

Check prices at:

Radeon HD 6750 1GB

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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