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Radeon R9 380 4G vs Radeon R9 M390X

Intro

The Radeon R9 380 4G uses a 28 nm design. AMD has set the core frequency at 970 MHz. The GDDR5 memory runs at a frequency of 1425 MHz on this card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Compare that to the Radeon R9 M390X, which comes with a core clock speed of 723 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
Radeon R9 380 4G 190 Watts
Difference: 65 Watts (52%)

Memory Bandwidth

In theory, the Radeon R9 380 4G should perform just a bit faster than the Radeon R9 M390X in general. (explain)

Radeon R9 380 4G 182400 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 22400 (14%)

Texel Rate

The Radeon R9 380 4G should be a small bit (approximately 17%) faster with regards to texture filtering than the Radeon R9 M390X. (explain)

Radeon R9 380 4G 108640 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 16096 (17%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 380 4G is the winner, and very much so. (explain)

Radeon R9 380 4G 31040 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 7904 (34%)

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 R9 380 4G

Amazon.com

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Radeon R9 M390X

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.

Specifications

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Model Radeon R9 380 4G Radeon R9 M390X
Manufacturer AMD AMD
Year June 2015 2015
Code Name Antigua PRO Tonga
Memory 4096 MB 4096 MB
Core Speed 970 MHz 723 MHz
Memory Speed 5700 MHz 5000 MHz
Power (Max TDP) 190 watts 125 watts
Bandwidth 182400 MB/sec 160000 MB/sec
Texel Rate 108640 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 31040 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 5000 million (Unknown) million
Bus PCIe 3.0 ×16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.3

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

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics 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 video card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 380 4G

Amazon.com

Check prices at:

Radeon R9 M390X

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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