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Radeon R9 M385X vs Radeon R9 M395X

Intro

The Radeon R9 M385X uses a 28 nm design. AMD has set the core frequency at 1100 MHz. The GDDR5 RAM works at a speed of 1500 MHz on this particular model. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon R9 M395X, which features 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 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M395X should be much faster than the Radeon R9 M385X in general. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon R9 M385X 96000 MB/sec
Difference: 64000 (67%)

Texel Rate

The Radeon R9 M395X should be quite a bit (more or less 50%) better at texture filtering than the Radeon R9 M385X. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon R9 M385X 61600 Mtexels/sec
Difference: 30944 (50%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M395X is superior to the Radeon R9 M385X, by far. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon R9 M385X 17600 Mpixels/sec
Difference: 5536 (31%)

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 M385X

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 M385X Radeon R9 M395X
Manufacturer AMD AMD
Year 2015 2015
Code Name Bonaire Tonga
Memory 4096 MB 4096 MB
Core Speed 1100 MHz 723 MHz
Memory Speed 6000 MHz 5000 MHz
Power (Max TDP) (Unknown) watts 125 watts
Bandwidth 96000 MB/sec 160000 MB/sec
Texel Rate 61600 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 17600 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 896 2048
Texture Mapping Units 56 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon R9 M385X

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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