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Radeon HD 5750 1GB vs Radeon HD 7870

Intro

The Radeon HD 5750 1GB comes with a GPU clock speed of 700 MHz, and the 1024 MB of GDDR5 memory is set to run at 1150 MHz through a 128-bit bus. It also is comprised of 720(144x5) Stream Processors, 36 TAUs, and 16 ROPs.

Compare those specifications to the Radeon HD 7870, which comes with GPU core speed of 1000 MHz, and 2048 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB 86 Watts
Radeon HD 7870 175 Watts
Difference: 89 Watts (103%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7870 should theoretically be quite a bit superior to the Radeon HD 5750 1GB overall. (explain)

Radeon HD 7870 153600 MB/sec
Radeon HD 5750 1GB 73600 MB/sec
Difference: 80000 (109%)

Texel Rate

The Radeon HD 7870 should be a lot (about 217%) more effective at AF than the Radeon HD 5750 1GB. (explain)

Radeon HD 7870 80000 Mtexels/sec
Radeon HD 5750 1GB 25200 Mtexels/sec
Difference: 54800 (217%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7870 is a better choice, by far. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon HD 5750 1GB 11200 Mpixels/sec
Difference: 20800 (186%)

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 7870

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 7870
Manufacturer AMD AMD
Year October 13, 2009 March 2012
Code Name Juniper LE Pitcairn XT
Memory 1024 MB 2048 MB
Core Speed 700 MHz 1000 MHz
Memory Speed 4600 MHz 4800 MHz
Power (Max TDP) 86 watts 175 watts
Bandwidth 73600 MB/sec 153600 MB/sec
Texel Rate 25200 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 11200 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 720(144x5) 1280
Texture Mapping Units 36 80
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 2800 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: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 can be applied per second. This is worked out by multiplying the total number of texture units by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 5750 1GB

Amazon.com

Check prices at:

Radeon HD 7870

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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