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Radeon R9 M295X vs Radeon R9 M390X

Intro

The Radeon R9 M295X makes use of a 28 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this particular card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Compare all that to the Radeon R9 M390X, which features 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 Texture Address Units 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

The Radeon R9 M295X should in theory perform a small bit faster than 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 will be a small bit (approximately 4%) better at 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 is just a bit (more or less 4%) faster with regards to anti-aliasing than the Radeon R9 M390X, and will be able to handle higher resolutions without losing too much performance. (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

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 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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max 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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