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Radeon RX 570 vs Radeon RX 6600 XT

Intro

The Radeon RX 570 features core clock speeds of 1168 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 6600 XT, which makes use of a 7 nm design. AMD has set the core frequency at 1968 MHz. The GDDR6 RAM works at a frequency of 2000 MHz on this specific model. It features 2048 SPUs as well as 128 TAUs and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 570		150 Watts
Radeon RX 6600 XT		160 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6600 XT should be 14% faster than the Radeon RX 570 overall, due to its higher data rate. (explain)

Radeon RX 6600 XT		262144 MB/sec
Radeon RX 570		229376 MB/sec
	Difference: 32768 (14%)

Texel Rate

The Radeon RX 6600 XT should be a lot (more or less 68%) faster with regards to anisotropic filtering than the Radeon RX 570. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon RX 570		149504 Mtexels/sec
	Difference: 102400 (68%)

Pixel Rate

The Radeon RX 6600 XT is a lot (about 237%) more effective at FSAA than the Radeon RX 570, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon RX 570		37376 Mpixels/sec
	Difference: 88576 (237%)

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 570

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Radeon RX 6600 XT

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Specifications

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Model	Radeon RX 570	Radeon RX 6600 XT
Manufacturer	AMD	AMD
Year	April 2017	August 2021
Code Name	Polaris 20	Navi 23 XT
Memory	4096 MB	8192 MB
Core Speed	1168 MHz	1968 MHz
Memory Speed	7000 MHz	4000 GB/s
Power (Max TDP)	150 watts	160 watts
Bandwidth	229376 MB/sec	262144 MB/sec
Texel Rate	149504 Mtexels/sec	251904 Mtexels/sec
Pixel Rate	37376 Mpixels/sec	125952 Mpixels/sec
Unified Shaders	2048	2048
Texture Mapping Units	128	128
Render Output Units	32	64
Bus Type	GDDR5	GDDR6
Bus Width	256-bit	128-bit
Fab Process	14 nm	7 nm
Transistors	5700 million	11060 million
Bus	PCIe 3.0 x16	PCIe 4.0 x16
DirectX Version	DirectX 12.0	DirectX 12
OpenGL Version	OpenGL 4.5	OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 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 texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

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