Radeon R9 390 8G vs Radeon RX 5500

Intro

Compare all that to the Radeon RX 5500, which has a clock speed of 1670 MHz and a GDDR6 memory frequency of 1750 MHz. It also makes use of a 128-bit memory bus, and uses a 7 nm design. It features 1408 SPUs, 88 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 5500		150 Watts
Radeon R9 390 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G is 67% faster than the Radeon RX 5500 overall, because of its greater data rate. (explain)

Radeon R9 390 8G		384000 MB/sec
Radeon RX 5500		229376 MB/sec
	Difference: 154624 (67%)

Texel Rate

The Radeon R9 390 8G should be just a bit (more or less 9%) more effective at anisotropic filtering than the Radeon RX 5500. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon RX 5500		146960 Mtexels/sec
	Difference: 13040 (9%)

Pixel Rate

The Radeon R9 390 8G will be a small bit (more or less 20%) faster with regards to full screen anti-aliasing than the Radeon RX 5500, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon RX 5500		53440 Mpixels/sec
	Difference: 10560 (20%)

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 data (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.