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Radeon RX 480 vs Radeon RX 6600 XT

Intro

The Radeon RX 480 comes with core clock speeds of 1120 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs along with 144 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 memory runs at a speed of 2000 MHz on this particular model. It features 2048 SPUs along with 128 Texture Address Units and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
Radeon RX 6600 XT		160 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The Radeon RX 6600 XT will be much (approximately 56%) faster with regards to AF than the Radeon RX 480. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon RX 480		161280 Mtexels/sec
	Difference: 90624 (56%)

Pixel Rate

The Radeon RX 6600 XT should be much (about 251%) better at FSAA than the Radeon RX 480, and will be able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon RX 480		35840 Mpixels/sec
	Difference: 90112 (251%)

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 480

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Radeon RX 6600 XT

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Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model	Radeon RX 480	Radeon RX 6600 XT
Manufacturer	AMD	AMD
Year	June 2016	August 2021
Code Name	Polaris 10	Navi 23 XT
Memory	8192 MB	8192 MB
Core Speed	1120 MHz	1968 MHz
Memory Speed	8000 MHz	4000 GB/s
Power (Max TDP)	150 watts	160 watts
Bandwidth	262144 MB/sec	262144 MB/sec
Texel Rate	161280 Mtexels/sec	251904 Mtexels/sec
Pixel Rate	35840 Mpixels/sec	125952 Mpixels/sec
Unified Shaders	2304	2048
Texture Mapping Units	144	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 information (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at 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 the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out 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 drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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