Radeon Pro Duo vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which has 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 ROPs.

Display Graphs

Hide Graphs

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

Performance-wise, the Radeon Pro Duo should theoretically be quite a bit better than the Radeon R9 M390X in general. (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 (approximately 453%) faster with regards to AF than the Radeon R9 M390X. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the Radeon Pro Duo is a better choice, 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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.