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Radeon HD 5570 vs Radeon HD 7870

Intro

The Radeon HD 5570 uses a 40 nm design. AMD has clocked the core speed at 650 MHz. The DDR3 memory runs at a speed of 900 MHz on this specific model. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 ROPs.

Compare that to the Radeon HD 7870, which features a clock speed of 1000 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5570 43 Watts
Radeon HD 7870 175 Watts
Difference: 132 Watts (307%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 should be quite a bit faster than the Radeon HD 5570 overall. (explain)

Radeon HD 7870 153600 MB/sec
Radeon HD 5570 28800 MB/sec
Difference: 124800 (433%)

Texel Rate

The Radeon HD 7870 should be quite a bit (approximately 515%) more effective at anisotropic filtering than the Radeon HD 5570. (explain)

Radeon HD 7870 80000 Mtexels/sec
Radeon HD 5570 13000 Mtexels/sec
Difference: 67000 (515%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7870 is the winner, by far. (explain)

Radeon HD 7870 32000 Mpixels/sec
Radeon HD 5570 5200 Mpixels/sec
Difference: 26800 (515%)

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 5570

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 5570 Radeon HD 7870
Manufacturer AMD AMD
Year February 9, 2010 March 2012
Code Name Redwood PRO Pitcairn XT
Memory 512 MB 2048 MB
Core Speed 650 MHz 1000 MHz
Memory Speed 1800 MHz 4800 MHz
Power (Max TDP) 43 watts 175 watts
Bandwidth 28800 MB/sec 153600 MB/sec
Texel Rate 13000 Mtexels/sec 80000 Mtexels/sec
Pixel Rate 5200 Mpixels/sec 32000 Mpixels/sec
Unified Shaders 400(80x5) 1280
Texture Mapping Units 20 80
Render Output Units 8 32
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 627 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 largest amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon HD 5570

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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