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Radeon RX 470 vs Radeon RX 5500 XT

Intro

The Radeon RX 470 features a core clock frequency of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also features a 256-bit memory bus, and uses a 14 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon RX 5500 XT, which uses a 7 nm design. AMD has clocked the core frequency at 1717 MHz. The GDDR6 RAM is set to run at a frequency of 1750 MHz on this specific card. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon RX 5500 XT		130 Watts
	Difference: 10 Watts (8%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5500 XT is 9% faster than the Radeon RX 470 in general, because of its greater data rate. (explain)

Radeon RX 5500 XT		229376 MB/sec
Radeon RX 470		211200 MB/sec
	Difference: 18176 (9%)

Texel Rate

The Radeon RX 5500 XT should be a lot (about 27%) better at anisotropic filtering than the Radeon RX 470. (explain)

Radeon RX 5500 XT		151096 Mtexels/sec
Radeon RX 470		118528 Mtexels/sec
	Difference: 32568 (27%)

Pixel Rate

The Radeon RX 5500 XT should be much (about 85%) faster with regards to full screen anti-aliasing than the Radeon RX 470, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 5500 XT		54944 Mpixels/sec
Radeon RX 470		29632 Mpixels/sec
	Difference: 25312 (85%)

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 470

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Radeon RX 5500 XT

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Specifications

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Model	Radeon RX 470	Radeon RX 5500 XT
Manufacturer	AMD	AMD
Year	August 2016	December 2019
Code Name	Polaris 10	Navi 14 XTX
Memory	8192 MB	8192 MB
Core Speed	926 MHz	1717 MHz
Memory Speed	6600 MHz	3500 GB/s
Power (Max TDP)	120 watts	130 watts
Bandwidth	211200 MB/sec	229376 MB/sec
Texel Rate	118528 Mtexels/sec	151096 Mtexels/sec
Pixel Rate	29632 Mpixels/sec	54944 Mpixels/sec
Unified Shaders	2048	1408
Texture Mapping Units	128	88
Render Output Units	32	32
Bus Type	GDDR5	GDDR6
Bus Width	256-bit	128-bit
Fab Process	14 nm	7 nm
Transistors	5700 million	6400 million
Bus	PCIe 3.0 x16	PCIe 4.0 ×16
DirectX Version	DirectX 12.0	DirectX 12
OpenGL Version	OpenGL 4.5	OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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