Radeon Pro Duo vs Radeon R9 M390X

Intro

Compare all that to the Radeon R9 M390X, which has GPU 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 Stream Processors, 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 Pro Duo		350 Watts
	Difference: 225 Watts (180%)

Memory Bandwidth

In theory, the Radeon Pro Duo is 540% quicker than the Radeon R9 M390X overall, due to its higher data rate. (explain)

Radeon Pro Duo		1024000 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 864000 (540%)

Texel Rate

The Radeon Pro Duo will be quite a bit (more or less 453%) better at texture filtering than the Radeon R9 M390X. (explain)

Radeon Pro Duo		512000 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 419456 (453%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon Pro Duo is the winner, by a large margin. (explain)

Radeon Pro Duo		128000 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 104864 (453%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.