Radeon R9 390 8G vs Radeon RX 590

Intro

Compare those specifications to the Radeon RX 590, which has a clock speed of 1469 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit memory bus, and uses a 12 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 590		175 Watts
Radeon R9 390 8G		275 Watts
	Difference: 100 Watts (57%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G should be quite a bit faster than the Radeon RX 590 overall. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon RX 590		262144 MB/sec
	Difference: 121856 (46%)

Texel Rate

The Radeon RX 590 is much (about 32%) better at AF than the Radeon R9 390 8G. (explain)

Radeon RX 590		211536 Mtexels/sec
Radeon R9 390 8G		160000 Mtexels/sec
	Difference: 51536 (32%)

Pixel Rate

The Radeon R9 390 8G is quite a bit (about 36%) better at full screen anti-aliasing than the Radeon RX 590, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon RX 590		47008 Mpixels/sec
	Difference: 16992 (36%)

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.