Radeon R9 M390X vs Radeon R9 Nano

Intro

Compare that to the Radeon R9 Nano, which features GPU core speed of 1000 MHz, and 4096 MB of HBM memory running at 500 MHz through a 4096-bit bus. It also is made up of 4096 Stream Processors, 256 TAUs, and 64 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon R9 Nano		175 Watts
	Difference: 50 Watts (40%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 Nano is 220% quicker than the Radeon R9 M390X in general, due to its higher bandwidth. (explain)

Radeon R9 Nano		512000 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 352000 (220%)

Texel Rate

The Radeon R9 Nano is much (more or less 177%) faster with regards to AF than the Radeon R9 M390X. (explain)

Radeon R9 Nano		256000 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 163456 (177%)

Pixel Rate

The Radeon R9 Nano will be quite a bit (about 177%) faster with regards to AA than the Radeon R9 M390X, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 Nano		64000 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 40864 (177%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.