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Radeon RX 6600 XT vs Radeon RX 7900 XTX

Intro

The Radeon RX 6600 XT has a GPU clock speed of 1968 MHz, and the 8192 MB of GDDR6 memory is set to run at 2000 MHz through a 128-bit bus. It also features 2048 SPUs, 128 Texture Address Units, and 64 ROPs.

Compare those specifications to the Radeon RX 7900 XTX, which features GPU core speed of 1855 MHz, and 24576 MB of GDDR6 RAM running at 2500 MHz through a 384-bit bus. It also is made up of 6144 SPUs, 384 Texture Address Units, and 192 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Radeon RX 7900 XTX 355 Watts
Difference: 195 Watts (122%)

Memory Bandwidth

As far as performance goes, the Radeon RX 7900 XTX should theoretically be quite a bit superior to the Radeon RX 6600 XT overall. (explain)

Radeon RX 7900 XTX 983040 MB/sec
Radeon RX 6600 XT 262144 MB/sec
Difference: 720896 (275%)

Texel Rate

The Radeon RX 7900 XTX will be much (more or less 183%) faster with regards to anisotropic filtering than the Radeon RX 6600 XT. (explain)

Radeon RX 7900 XTX 712320 Mtexels/sec
Radeon RX 6600 XT 251904 Mtexels/sec
Difference: 460416 (183%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon RX 7900 XTX is superior to the Radeon RX 6600 XT, by far. (explain)

Radeon RX 7900 XTX 356160 Mpixels/sec
Radeon RX 6600 XT 125952 Mpixels/sec
Difference: 230208 (183%)

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 6600 XT

Amazon.com

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Radeon RX 7900 XTX

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 6600 XT Radeon RX 7900 XTX
Manufacturer AMD AMD
Year August 2021 December 2022
Code Name Navi 23 XT Navi 31 XTX
Memory 8192 MB 24576 MB
Core Speed 1968 MHz 1855 MHz
Memory Speed 2000 GB/s 2500 GB/s
Power (Max TDP) 160 watts 355 watts
Bandwidth 262144 MB/sec 983040 MB/sec
Texel Rate 251904 Mtexels/sec 712320 Mtexels/sec
Pixel Rate 125952 Mpixels/sec 356160 Mpixels/sec
Unified Shaders 2048 6144
Texture Mapping Units 128 384
Render Output Units 64 192
Bus Type GDDR6 GDDR6
Bus Width 128-bit 384-bit
Fab Process 7 nm 5 nm
Transistors 11060 million 57700 million
Bus PCIe 4.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.6 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

Radeon RX 6600 XT

Amazon.com

Check prices at:

Radeon RX 7900 XTX

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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