Radeon R9 390X 8G vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which has a GPU core clock speed of 1175 MHz, and 4096 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also is comprised of 1024 SPUs, 64 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 560		80 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 195 Watts (244%)

Memory Bandwidth

In theory, the Radeon R9 390X 8G should be a lot faster than the Radeon RX 560 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon RX 560		114688 MB/sec
	Difference: 269312 (235%)

Texel Rate

The Radeon R9 390X 8G will be much (about 146%) better at anisotropic filtering than the Radeon RX 560. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon RX 560		75200 Mtexels/sec
	Difference: 109600 (146%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390X 8G is a better choice, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon RX 560		18800 Mpixels/sec
	Difference: 48400 (257%)

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 information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 texture map elements (texels) that can be processed per second. This 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 video 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 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 ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.