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Radeon R9 M395X vs Radeon R9 Nano

Intro

The Radeon R9 M395X has core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon R9 Nano, which uses a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The HBM RAM is set to run at a frequency of 500 MHz on this particular card. It features 4096 SPUs as well as 256 TAUs 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

Theoretically speaking, the Radeon R9 Nano should perform a lot faster than the Radeon R9 M395X overall. (explain)

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

Texel Rate

The Radeon R9 Nano is a lot (about 177%) more effective at anisotropic 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 screen resolution is important to you, then the Radeon R9 Nano is a better choice, by far. (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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better 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 most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 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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