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Radeon HD 5750 1GB vs Radeon HD 6950 2GB

Intro

The Radeon HD 5750 1GB has a GPU core clock speed of 700 MHz, and the 1024 MB of GDDR5 RAM runs at 1150 MHz through a 128-bit bus. It also features 720(144x5) SPUs, 36 TAUs, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6950 2GB, which features core speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB 86 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 114 Watts (133%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB should be much faster than the Radeon HD 5750 1GB in general. (explain)

Radeon HD 6950 2GB 160000 MB/sec
Radeon HD 5750 1GB 73600 MB/sec
Difference: 86400 (117%)

Texel Rate

The Radeon HD 6950 2GB will be much (approximately 179%) more effective at AF than the Radeon HD 5750 1GB. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
Radeon HD 5750 1GB 25200 Mtexels/sec
Difference: 45200 (179%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is a better choice, by a large margin. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
Radeon HD 5750 1GB 11200 Mpixels/sec
Difference: 14400 (129%)

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 1GB

Amazon.com

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Radeon HD 6950 2GB

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 5750 1GB Radeon HD 6950 2GB
Manufacturer AMD AMD
Year October 13, 2009 December 2010
Code Name Juniper LE Cayman Pro
Memory 1024 MB 2048 MB
Core Speed 700 MHz 800 MHz
Memory Speed 4600 MHz 5000 MHz
Power (Max TDP) 86 watts 200 watts
Bandwidth 73600 MB/sec 160000 MB/sec
Texel Rate 25200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 11200 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 720(144x5) 1408
Texture Mapping Units 36 88
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 1040 million 2640 million
Bus PCIe 2.1 x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 3.2 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 5750 1GB

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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