Radeon R9 M390X vs Radeon RX 550

Intro

Compare those specifications to the Radeon RX 550, which features a core clock speed of 1100 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 128-bit memory bus, and makes use of a 14 nm design. It is made up of 512 SPUs, 32 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
Radeon R9 M390X		125 Watts
	Difference: 75 Watts (150%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should theoretically be a lot better than the Radeon RX 550 in general. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon RX 550		114688 MB/sec
	Difference: 45312 (40%)

Texel Rate

The Radeon R9 M390X will be a lot (approximately 163%) faster with regards to texture filtering than the Radeon RX 550. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon RX 550		35200 Mtexels/sec
	Difference: 57344 (163%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M390X is the winner, by a large margin. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon RX 550		17600 Mpixels/sec
	Difference: 5536 (31%)

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 (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.