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Radeon R9 M295X vs Radeon R9 M390X

Intro

The Radeon R9 M295X comes with a GPU core clock speed of 750 MHz, and the 4096 MB of GDDR5 RAM is set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 Texture Address Units, and 32 Raster Operation Units.

Compare all of that to the Radeon R9 M390X, which comes with core clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the Radeon R9 M295X should in theory be a bit superior to the Radeon R9 M390X overall. (explain)

Radeon R9 M295X 176000 MB/sec
Radeon R9 M390X 160000 MB/sec
Difference: 16000 (10%)

Texel Rate

The Radeon R9 M295X is a bit (more or less 4%) faster with regards to texture filtering than the Radeon R9 M390X. (explain)

Radeon R9 M295X 96000 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 3456 (4%)

Pixel Rate

The Radeon R9 M295X should be a little bit (about 4%) more effective at anti-aliasing than the Radeon R9 M390X, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M295X 24000 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 864 (4%)

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 M295X

Amazon.com

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Radeon R9 M390X

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 M295X Radeon R9 M390X
Manufacturer AMD AMD
Year 2014 2015
Code Name Unknown Tonga
Memory 4096 MB 4096 MB
Core Speed 750 MHz 723 MHz
Memory Speed 5500 MHz 5000 MHz
Power (Max TDP) 125 watts 125 watts
Bandwidth 176000 MB/sec 160000 MB/sec
Texel Rate 96000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-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 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 M295X

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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