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Radeon R9 380 2G vs Radeon R9 M390X

Intro

The Radeon R9 380 2G features core speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 M390X, which has a core clock speed of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
Radeon R9 380 2G 190 Watts
Difference: 65 Watts (52%)

Memory Bandwidth

In theory, the Radeon R9 380 2G should be 14% faster than the Radeon R9 M390X overall, because of its greater data rate. (explain)

Radeon R9 380 2G 182400 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 22400 (14%)

Texel Rate

The Radeon R9 380 2G will be just a bit (approximately 17%) faster with regards to anisotropic filtering than the Radeon R9 M390X. (explain)

Radeon R9 380 2G 108640 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 16096 (17%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 2G is the winner, by far. (explain)

Radeon R9 380 2G 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 2G

Amazon.com

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Radeon R9 M390X

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 R9 380 2G Radeon R9 M390X
Manufacturer AMD AMD
Year June 2015 2015
Code Name Antigua PRO Tonga
Memory 2048 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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per 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 higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 380 2G

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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