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Radeon HD 5750 512MB vs Radeon HD 6750 1GB

Intro

The Radeon HD 5750 512MB comes with a clock frequency of 700 MHz and a GDDR5 memory speed of 1150 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 720(144x5) SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Compare all of that to the Radeon HD 6750 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this specific model. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon HD 5750 512MB should theoretically perform just a bit faster than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 5750 512MB 73600 MB/sec
Radeon HD 6750 1GB 64000 MB/sec
Difference: 9600 (15%)

Texel Rate

The Radeon HD 6750 1GB will be a bit (about 4%) faster with regards to AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
Radeon HD 5750 512MB 25200 Mtexels/sec
Difference: 900 (4%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6750 1GB is the winner, but not by far. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
Radeon HD 5750 512MB 11200 Mpixels/sec
Difference: 400 (4%)

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 5750 512MB

Amazon.com

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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 5750 512MB Radeon HD 6750 1GB
Manufacturer AMD AMD
Year October 13, 2009 January 2011
Code Name Juniper LE Juniper Pro
Memory 512 MB 1024 MB
Core Speed 700 MHz 725 MHz
Memory Speed 4600 MHz 4000 MHz
Power (Max TDP) 86 watts 86 watts
Bandwidth 73600 MB/sec 64000 MB/sec
Texel Rate 25200 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 11200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 720(144x5) 720
Texture Mapping Units 36 36
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 1040 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 transported over the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 5750 512MB

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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