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Radeon HD 6670 (OEM) vs Radeon HD 6750 1GB

Intro

The Radeon HD 6670 (OEM) uses a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this specific model. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.

Compare all that to the Radeon HD 6750 1GB, which comes with GPU clock speed of 725 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also features 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6670 (OEM) 63 Watts
Radeon HD 6750 1GB 86 Watts
Difference: 23 Watts (37%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The Radeon HD 6750 1GB should be much (approximately 36%) better at AF than the Radeon HD 6670 (OEM). (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 6670 (OEM) 19200 Mtexels/sec
Difference: 6900 (36%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6750 1GB is the winner, and very much so. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 6670 (OEM) 6400 Mpixels/sec
Difference: 5200 (81%)

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 6670 (OEM)

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 6670 (OEM) Radeon HD 6750 1GB
Manufacturer AMD AMD
Year February 2011 January 2011
Code Name Turks Juniper Pro
Memory 512 MB 1024 MB
Core Speed 800 MHz 725 MHz
Memory Speed 4000 MHz 4000 MHz
Power (Max TDP) 63 watts 86 watts
Bandwidth 64000 MB/sec 64000 MB/sec
Texel Rate 19200 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 6400 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 480 720
Texture Mapping Units 24 36
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 715 million 1040 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 6670 (OEM)

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.

Comments

One Response to “Radeon HD 6670 (OEM) vs Radeon HD 6750 1GB”
Buying a new computer - Tech Support Forums - TechIMO.com says:

[...] to TechIMO! HD6750 by quire a bit Theoretical benchmark Radeon HD 6670 (OEM) vs Radeon HD 6750 1GB – Performance Comparison Benchmarks @ Hardware Comp... __________________ Hard Sayin Not [...]

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