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Radeon RX 590 vs Radeon RX 6600 XT

Intro

The Radeon RX 590 has a core clock frequency of 1469 MHz and a GDDR5 memory frequency of 2000 MHz. It also makes use of a 256-bit memory bus, and makes use of a 12 nm design. It features 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the Radeon RX 6600 XT, which has core clock speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 RAM. 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 6600 XT 160 Watts
Radeon RX 590 175 Watts
Difference: 15 Watts (9%)

Memory Bandwidth

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

Texel Rate

The Radeon RX 6600 XT should be a small bit (approximately 19%) more effective at AF than the Radeon RX 590. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Radeon RX 590 211536 Mtexels/sec
Difference: 40368 (19%)

Pixel Rate

The Radeon RX 6600 XT should be a lot (more or less 168%) more effective at anti-aliasing than the Radeon RX 590, and will be able to handle higher screen resolutions better. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon RX 590 47008 Mpixels/sec
Difference: 78944 (168%)

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 590

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 590 Radeon RX 6600 XT
Manufacturer AMD AMD
Year November 2018 August 2021
Code Name Polaris 30 Navi 23 XT
Memory 8192 MB 8192 MB
Core Speed 1469 MHz 1968 MHz
Memory Speed 8000 MHz 4000 GB/s
Power (Max TDP) 175 watts 160 watts
Bandwidth 262144 MB/sec 262144 MB/sec
Texel Rate 211536 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 47008 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 12 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 (measured in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon RX 590

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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