Radeon R9 390X 8G vs Radeon RX 5700 XT

Intro

Compare those specs to the Radeon RX 5700 XT, which features a core clock speed of 1605 MHz and a GDDR6 memory speed of 1750 MHz. It also uses a 256-bit bus, and makes use of a 7 nm design. It is made up of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5700 XT		225 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 50 Watts (22%)

Memory Bandwidth

In theory, the Radeon RX 5700 XT is 19% faster than the Radeon R9 390X 8G in general, due to its higher bandwidth. (explain)

Radeon RX 5700 XT		458752 MB/sec
Radeon R9 390X 8G		384000 MB/sec
	Difference: 74752 (19%)

Texel Rate

The Radeon RX 5700 XT should be quite a bit (about 39%) more effective at anisotropic filtering than the Radeon R9 390X 8G. (explain)

Radeon RX 5700 XT		256800 Mtexels/sec
Radeon R9 390X 8G		184800 Mtexels/sec
	Difference: 72000 (39%)

Pixel Rate

If using a high resolution is important to you, then the Radeon RX 5700 XT is the winner, by far. (explain)

Radeon RX 5700 XT		102720 Mpixels/sec
Radeon R9 390X 8G		67200 Mpixels/sec
	Difference: 35520 (53%)

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 megabytes per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.