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Radeon R9 M395X vs Radeon R9 Nano

Intro

The Radeon R9 M395X has a GPU 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 is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon R9 Nano, which features a core clock speed of 1000 MHz and a HBM memory speed of 500 MHz. It also features a 4096-bit bus, and uses a 28 nm design. It is made up of 4096 SPUs, 256 TAUs, and 64 Raster Operation Units.

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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

The Radeon R9 Nano should theoretically be a lot faster 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 will be a lot (more or less 177%) faster with regards to 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 using high levels of AA 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 max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high 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 of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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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.

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