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Radeon RX 580 vs Radeon RX 6600

Intro

The Radeon RX 580 has a GPU clock speed of 1257 MHz, and the 8192 MB of GDDR5 memory is set to run at 2000 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 144 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon RX 6600, which has a GPU core clock speed of 1626 MHz, and 8192 MB of GDDR6 memory set to run at 1750 MHz through a 128-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 132 Watts
Radeon RX 580 185 Watts
Difference: 53 Watts (40%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 580 should be a bit faster than the Radeon RX 6600 overall. (explain)

Radeon RX 580 262144 MB/sec
Radeon RX 6600 229376 MB/sec
Difference: 32768 (14%)

Texel Rate

The Radeon RX 6600 should be a bit (about 1%) better at anisotropic filtering than the Radeon RX 580. (explain)

Radeon RX 6600 182112 Mtexels/sec
Radeon RX 580 181008 Mtexels/sec
Difference: 1104 (1%)

Pixel Rate

The Radeon RX 6600 is much (approximately 159%) more effective at AA than the Radeon RX 580, and should be capable of handling higher resolutions better. (explain)

Radeon RX 6600 104064 Mpixels/sec
Radeon RX 580 40224 Mpixels/sec
Difference: 63840 (159%)

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

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
Manufacturer AMD AMD
Year April 2017 October 2021
Code Name Polaris 20 Navi 23
Memory 8192 MB 8192 MB
Core Speed 1257 MHz 1626 MHz
Memory Speed 8000 MHz 3500 GB/s
Power (Max TDP) 185 watts 132 watts
Bandwidth 262144 MB/sec 229376 MB/sec
Texel Rate 181008 Mtexels/sec 182112 Mtexels/sec
Pixel Rate 40224 Mpixels/sec 104064 Mpixels/sec
Unified Shaders 2304 1792
Texture Mapping Units 144 112
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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per 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 - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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Radeon RX 580

Amazon.com

Check prices at:

Radeon RX 6600

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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