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Radeon R9 M290X vs Radeon R9 M390X

Intro

The Radeon R9 M290X features core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 4096 MB of GDDR5 memory. It features 1280 SPUs as well as 80 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon R9 M390X, which features GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 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 M290X 100 Watts
Radeon R9 M390X 125 Watts
Difference: 25 Watts (25%)

Memory Bandwidth

The Radeon R9 M390X should in theory be a bit faster than the Radeon R9 M290X in general. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon R9 M290X 153600 MB/sec
Difference: 6400 (4%)

Texel Rate

The Radeon R9 M390X is a lot (approximately 36%) better at AF than the Radeon R9 M290X. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon R9 M290X 68000 Mtexels/sec
Difference: 24544 (36%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M290X is the winner, not by a very large margin though. (explain)

Radeon R9 M290X 27200 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 4064 (18%)

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 M290X

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 M290X Radeon R9 M390X
Manufacturer AMD AMD
Year May 1 2014 2015
Code Name Neptune XT Tonga
Memory 4096 MB 4096 MB
Core Speed 850 MHz 723 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 100 watts 125 watts
Bandwidth 153600 MB/sec 160000 MB/sec
Texel Rate 68000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 27200 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 (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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the 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 amount of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 M290X

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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