Radeon R9 M390X vs Radeon RX 5500 XT

Intro

Compare those specs to the Radeon RX 5500 XT, which features core clock speeds of 1717 MHz on the GPU, and 1750 MHz on the 8192 MB of GDDR6 RAM. It features 1408 SPUs as well as 88 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
Radeon RX 5500 XT		130 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

In theory, the Radeon RX 5500 XT should be 43% faster than the Radeon R9 M390X overall, due to its higher data rate. (explain)

Radeon RX 5500 XT		229376 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 69376 (43%)

Texel Rate

The Radeon RX 5500 XT should be quite a bit (approximately 63%) more effective at AF than the Radeon R9 M390X. (explain)

Radeon RX 5500 XT		151096 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 58552 (63%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 5500 XT is the winner, and very much so. (explain)

Radeon RX 5500 XT		54944 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 31808 (137%)

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 largest amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 ability to get to the maximum fill rate.