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Radeon R9 380X vs Radeon R9 M395X

Intro

The Radeon R9 380X features a clock speed of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 ROPs.

Compare that to the Radeon R9 M395X, which features core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
Radeon R9 380X 190 Watts
Difference: 65 Watts (52%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380X should in theory be a little bit superior to the Radeon R9 M395X in general. (explain)

Radeon R9 380X 182400 MB/sec
Radeon R9 M395X 160000 MB/sec
Difference: 22400 (14%)

Texel Rate

The Radeon R9 380X is quite a bit (more or less 34%) better at anisotropic filtering than the Radeon R9 M395X. (explain)

Radeon R9 380X 124160 Mtexels/sec
Radeon R9 M395X 92544 Mtexels/sec
Difference: 31616 (34%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 380X is a better choice, by a large margin. (explain)

Radeon R9 380X 31040 Mpixels/sec
Radeon R9 M395X 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 380X

Amazon.com

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Radeon R9 M395X

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 380X Radeon R9 M395X
Manufacturer AMD AMD
Year November 2015 2015
Code Name Tonga XT 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 124160 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 31040 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
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 x16 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 maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in one 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 - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon R9 380X

Amazon.com

Check prices at:

Radeon R9 M395X

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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