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Radeon RX 580 vs Radeon RX 6600 XT

Intro

The Radeon RX 580 uses a 14 nm design. AMD has clocked the core frequency at 1257 MHz. The GDDR5 RAM is set to run at a speed of 2000 MHz on this specific model. It features 2304 SPUs as well as 144 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon RX 6600 XT, which comes with a core clock frequency of 1968 MHz and a GDDR6 memory frequency of 2000 MHz. It also features a 128-bit bus, and uses a 7 nm design. It is made up of 2048 SPUs, 128 TAUs, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Radeon RX 580 185 Watts
Difference: 25 Watts (16%)

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The Radeon RX 6600 XT should be a lot (more or less 39%) better at texture filtering than the Radeon RX 580. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Radeon RX 580 181008 Mtexels/sec
Difference: 70896 (39%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 6600 XT is superior to the Radeon RX 580, by a large margin. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon RX 580 40224 Mpixels/sec
Difference: 85728 (213%)

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 580

Amazon.com

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Radeon RX 6600 XT

Amazon.com

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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 580 Radeon RX 6600 XT
Manufacturer AMD AMD
Year April 2017 August 2021
Code Name Polaris 20 Navi 23 XT
Memory 8192 MB 8192 MB
Core Speed 1257 MHz 1968 MHz
Memory Speed 8000 MHz 4000 GB/s
Power (Max TDP) 185 watts 160 watts
Bandwidth 262144 MB/sec 262144 MB/sec
Texel Rate 181008 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 40224 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 (measured in megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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

Display Prices

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Radeon RX 580

Amazon.com

Check prices at:

Radeon RX 6600 XT

Amazon.com

Check prices at:

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.

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