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Radeon HD 5750 512MB vs Radeon HD 7950 3GB

Intro

The Radeon HD 5750 512MB has core clock speeds of 700 MHz on the GPU, and 1150 MHz on the 512 MB of GDDR5 memory. It features 720(144x5) SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

Compare all that to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this specific card. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 512MB 86 Watts
Radeon HD 7950 3GB 200 Watts
Difference: 114 Watts (133%)

Memory Bandwidth

The Radeon HD 7950 3GB should in theory be a lot faster than the Radeon HD 5750 512MB in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
Radeon HD 5750 512MB 73600 MB/sec
Difference: 166400 (226%)

Texel Rate

The Radeon HD 7950 3GB is much (about 256%) better at AF than the Radeon HD 5750 512MB. (explain)

Radeon HD 7950 3GB 89600 Mtexels/sec
Radeon HD 5750 512MB 25200 Mtexels/sec
Difference: 64400 (256%)

Pixel Rate

The Radeon HD 7950 3GB should be much (about 129%) better at anti-aliasing than the Radeon HD 5750 512MB, and should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 7950 3GB 25600 Mpixels/sec
Radeon HD 5750 512MB 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 512MB

Amazon.com

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Radeon HD 7950 3GB

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 512MB Radeon HD 7950 3GB
Manufacturer AMD AMD
Year October 13, 2009 January 2012
Code Name Juniper LE Tahiti Pro
Memory 512 MB 3072 MB
Core Speed 700 MHz 800 MHz
Memory Speed 4600 MHz 5000 MHz
Power (Max TDP) 86 watts 200 watts
Bandwidth 73600 MB/sec 240000 MB/sec
Texel Rate 25200 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 11200 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 720(144x5) 1792
Texture Mapping Units 36 112
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 384-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 4313 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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card 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 colour ROPs by the clock 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 output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 5750 512MB

Amazon.com

Check prices at:

Radeon HD 7950 3GB

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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