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Radeon HD 5870 vs Radeon R9 380X

Intro

The Radeon HD 5870 has a clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is made up of 1600(320x5) SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 380X, which makes use of a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 RAM works at a speed of 1425 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870 188 Watts
Radeon R9 380X 190 Watts
Difference: 2 Watts (1%)

Memory Bandwidth

In theory, the Radeon R9 380X should be just a bit faster than the Radeon HD 5870 in general. (explain)

Radeon R9 380X 182400 MB/sec
Radeon HD 5870 153600 MB/sec
Difference: 28800 (19%)

Texel Rate

The Radeon R9 380X will be a lot (more or less 83%) faster with regards to AF than the Radeon HD 5870. (explain)

Radeon R9 380X 124160 Mtexels/sec
Radeon HD 5870 68000 Mtexels/sec
Difference: 56160 (83%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 380X is a better choice, not by a very large margin though. (explain)

Radeon R9 380X 31040 Mpixels/sec
Radeon HD 5870 27200 Mpixels/sec
Difference: 3840 (14%)

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 5870

Amazon.com

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Radeon R9 380X

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 5870 Radeon R9 380X
Manufacturer AMD AMD
Year September 23, 2009 November 2015
Code Name Cypress XT Tonga XT
Memory 1024 MB 4096 MB
Core Speed 850 MHz 970 MHz
Memory Speed 4800 MHz 5700 MHz
Power (Max TDP) 188 watts 190 watts
Bandwidth 153600 MB/sec 182400 MB/sec
Texel Rate 68000 Mtexels/sec 124160 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 31040 Mpixels/sec
Unified Shaders 1600(320x5) 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 2154 million 5000 million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12.0
OpenGL Version OpenGL 3.2 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at 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 can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon HD 5870

Amazon.com

Check prices at:

Radeon R9 380X

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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