Radeon R9 390 8G vs Radeon RX 5600 XT

Intro

Compare those specs to the Radeon RX 5600 XT, which features clock speeds of 1375 MHz on the GPU, and 1500 MHz on the 6144 MB of GDDR6 RAM. It features 2304 SPUs along with 144 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600 XT		160 Watts
Radeon R9 390 8G		275 Watts
	Difference: 115 Watts (72%)

Memory Bandwidth

In theory, the Radeon R9 390 8G should be 12% quicker than the Radeon RX 5600 XT overall, due to its higher data rate. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon RX 5600 XT		344064 MB/sec
	Difference: 39936 (12%)

Texel Rate

The Radeon RX 5600 XT will be quite a bit (approximately 24%) more effective at texture filtering than the Radeon R9 390 8G. (explain)

Radeon RX 5600 XT		198000 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 38000 (24%)

Pixel Rate

The Radeon RX 5600 XT is much (more or less 38%) better at full screen anti-aliasing than the Radeon R9 390 8G, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 24000 (38%)

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 maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.