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Radeon R9 270X vs Radeon R9 M390X

Intro

The Radeon R9 270X comes with a GPU core speed of 1000 MHz, and the 2048 MB of GDDR5 memory runs at 1400 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon R9 M390X, which features a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
Radeon R9 270X 180 Watts
Difference: 55 Watts (44%)

Memory Bandwidth

As far as performance goes, the Radeon R9 270X should in theory be a bit better than the Radeon R9 M390X in general. (explain)

Radeon R9 270X 179200 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 19200 (12%)

Texel Rate

The Radeon R9 M390X is a small bit (approximately 16%) faster with regards to texture filtering than the Radeon R9 270X. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon R9 270X 80000 Mtexels/sec
Difference: 12544 (16%)

Pixel Rate

The Radeon R9 270X will be quite a bit (approximately 38%) better at FSAA than the Radeon R9 M390X, and will be able to handle higher resolutions more effectively. (explain)

Radeon R9 270X 32000 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 8864 (38%)

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 270X

Amazon.com

Check prices at:

Radeon R9 M390X

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 270X Radeon R9 M390X
Manufacturer AMD AMD
Year October 2013 2015
Code Name Curacao XT Tonga
Memory 2048 MB 4096 MB
Core Speed 1000 MHz 723 MHz
Memory Speed 5600 MHz 5000 MHz
Power (Max TDP) 180 watts 125 watts
Bandwidth 179200 MB/sec 160000 MB/sec
Texel Rate 80000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 32000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1280 2048
Texture Mapping Units 80 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 2800 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon R9 270X

Amazon.com

Check prices at:

Radeon R9 M390X

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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