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Radeon RX 580 vs Radeon RX 6650 XT

Intro

The Radeon RX 580 features clock speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. It features 2304 SPUs as well as 144 TAUs and 32 ROPs.

Compare all that to the Radeon RX 6650 XT, which features core speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs along with 128 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Radeon RX 580 185 Watts
Difference: 9 Watts (5%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6650 XT will be 10% faster than the Radeon RX 580 overall, due to its higher bandwidth. (explain)

Radeon RX 6650 XT 287072 MB/sec
Radeon RX 580 262144 MB/sec
Difference: 24928 (10%)

Texel Rate

The Radeon RX 6650 XT is a lot (approximately 45%) better at texture filtering than the Radeon RX 580. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Radeon RX 580 181008 Mtexels/sec
Difference: 82032 (45%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6650 XT is a better choice, by far. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Radeon RX 580 40224 Mpixels/sec
Difference: 91296 (227%)

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

Check prices at:

Radeon RX 6650 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.

Specifications

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Model Radeon RX 580 Radeon RX 6650 XT
Manufacturer AMD AMD
Year April 2017 May 2022
Code Name Polaris 20 Navi 23
Memory 8192 MB 8192 MB
Core Speed 1257 MHz 2055 MHz
Memory Speed 8000 MHz 4380 GB/s
Power (Max TDP) 185 watts 176 watts
Bandwidth 262144 MB/sec 287072 MB/sec
Texel Rate 181008 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 40224 Mpixels/sec 131520 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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon RX 580

Amazon.com

Check prices at:

Radeon RX 6650 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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