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Radeon R9 M395X vs Radeon R9 Nano

Intro

The Radeon R9 M395X has a GPU core clock speed of 723 MHz, and the 4096 MB of GDDR5 memory is set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 Nano, which has a clock frequency of 1000 MHz and a HBM memory speed of 500 MHz. It also uses a 4096-bit memory bus, and makes use of a 28 nm design. It is comprised of 4096 SPUs, 256 Texture Address Units, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
Radeon R9 Nano 175 Watts
Difference: 50 Watts (40%)

Memory Bandwidth

As far as performance goes, the Radeon R9 Nano should in theory be a lot better than the Radeon R9 M395X in general. (explain)

Radeon R9 Nano 512000 MB/sec
Radeon R9 M395X 160000 MB/sec
Difference: 352000 (220%)

Texel Rate

The Radeon R9 Nano should be quite a bit (approximately 177%) faster with regards to texture filtering than the Radeon R9 M395X. (explain)

Radeon R9 Nano 256000 Mtexels/sec
Radeon R9 M395X 92544 Mtexels/sec
Difference: 163456 (177%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 Nano is superior to the Radeon R9 M395X, and very much so. (explain)

Radeon R9 Nano 64000 Mpixels/sec
Radeon R9 M395X 23136 Mpixels/sec
Difference: 40864 (177%)

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 M395X

Amazon.com

Check prices at:

Radeon R9 Nano

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 M395X Radeon R9 Nano
Manufacturer AMD AMD
Year 2015 September 2015
Code Name Tonga Fiji XT
Memory 4096 MB 4096 MB
Core Speed 723 MHz 1000 MHz
Memory Speed 5000 MHz 500 MHz
Power (Max TDP) 125 watts 175 watts
Bandwidth 160000 MB/sec 512000 MB/sec
Texel Rate 92544 Mtexels/sec 256000 Mtexels/sec
Pixel Rate 23136 Mpixels/sec 64000 Mpixels/sec
Unified Shaders 2048 4096
Texture Mapping Units 128 256
Render Output Units 32 64
Bus Type GDDR5 HBM
Bus Width 256-bit 4096-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 8900 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 amount of pixels the graphics card can 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 Render Output Units 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon R9 M395X

Amazon.com

Check prices at:

Radeon R9 Nano

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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