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Radeon RX 5500 vs Radeon RX 580

Intro

The Radeon RX 5500 features a GPU core clock speed of 1670 MHz, and the 4096 MB of GDDR6 memory is set to run at 1750 MHz through a 128-bit bus. It also features 1408 Stream Processors, 88 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon RX 580, which makes use of a 14 nm design. AMD has set the core frequency at 1257 MHz. The GDDR5 RAM works at a frequency of 2000 MHz on this specific model. It features 2304 SPUs along with 144 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500		150 Watts
Radeon RX 580		185 Watts
	Difference: 35 Watts (23%)

Memory Bandwidth

In theory, the Radeon RX 580 is 14% quicker than the Radeon RX 5500 overall, due to its higher data rate. (explain)

Radeon RX 580		262144 MB/sec
Radeon RX 5500		229376 MB/sec
	Difference: 32768 (14%)

Texel Rate

The Radeon RX 580 will be quite a bit (more or less 23%) better at texture filtering than the Radeon RX 5500. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon RX 5500		146960 Mtexels/sec
	Difference: 34048 (23%)

Pixel Rate

The Radeon RX 5500 is quite a bit (about 33%) faster with regards to full screen anti-aliasing than the Radeon RX 580, and will be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon RX 5500		53440 Mpixels/sec
Radeon RX 580		40224 Mpixels/sec
	Difference: 13216 (33%)

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

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Radeon RX 5500

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Radeon RX 580

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Specifications

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Model	Radeon RX 5500	Radeon RX 580
Manufacturer	AMD	AMD
Year	October 2019	April 2017
Code Name	Navi 14 XT	Polaris 20
Memory	4096 MB	8192 MB
Core Speed	1670 MHz	1257 MHz
Memory Speed	1750 GB/s	8000 MHz
Power (Max TDP)	150 watts	185 watts
Bandwidth	229376 MB/sec	262144 MB/sec
Texel Rate	146960 Mtexels/sec	181008 Mtexels/sec
Pixel Rate	53440 Mpixels/sec	40224 Mpixels/sec
Unified Shaders	1408	2304
Texture Mapping Units	88	144
Render Output Units	32	32
Bus Type	GDDR6	GDDR5
Bus Width	128-bit	256-bit
Fab Process	7 nm	14 nm
Transistors	6400 million	5700 million
Bus	PCIe 4.0 ×16	PCIe 3.0 x16
DirectX Version	DirectX 12	DirectX 12.0
OpenGL Version	OpenGL 4.6	OpenGL 4.5

Memory Bandwidth: Bandwidth is the max amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at 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 record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

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