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Radeon HD 5870 vs Radeon R9 M385X

Intro

The Radeon HD 5870 uses a 40 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory is set to run at a frequency of 1200 MHz on this model. It features 1600(320x5) SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon R9 M385X, which uses a 28 nm design. AMD has set the core speed at 1100 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this card. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 5870 should perform quite a bit faster than the Radeon R9 M385X in general. (explain)

Radeon HD 5870 153600 MB/sec
Radeon R9 M385X 96000 MB/sec
Difference: 57600 (60%)

Texel Rate

The Radeon HD 5870 should be just a bit (approximately 10%) more effective at texture filtering than the Radeon R9 M385X. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon R9 M385X 61600 Mtexels/sec
Difference: 6400 (10%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5870 is the winner, by far. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon R9 M385X 17600 Mpixels/sec
Difference: 9600 (55%)

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 M385X

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 M385X
Manufacturer AMD AMD
Year September 23, 2009 2015
Code Name Cypress XT Bonaire
Memory 1024 MB 4096 MB
Core Speed 850 MHz 1100 MHz
Memory Speed 4800 MHz 6000 MHz
Power (Max TDP) 188 watts (Unknown) watts
Bandwidth 153600 MB/sec 96000 MB/sec
Texel Rate 68000 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1600(320x5) 896
Texture Mapping Units 80 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 2154 million (Unknown) million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 3.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a 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 outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 5870

Amazon.com

Check prices at:

Radeon R9 M385X

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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