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Radeon R9 280X vs Radeon RX 6600 XT

Intro

The Radeon R9 280X features a core clock speed of 850 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon RX 6600 XT, which features clock speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 RAM. It features 2048 SPUs along with 128 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT 160 Watts
Radeon R9 280X 250 Watts
Difference: 90 Watts (56%)

Memory Bandwidth

Theoretically, the Radeon R9 280X should be just a bit faster than the Radeon RX 6600 XT in general. (explain)

Radeon R9 280X 288000 MB/sec
Radeon RX 6600 XT 262144 MB/sec
Difference: 25856 (10%)

Texel Rate

The Radeon RX 6600 XT is much (more or less 132%) more effective at texture filtering than the Radeon R9 280X. (explain)

Radeon RX 6600 XT 251904 Mtexels/sec
Radeon R9 280X 108800 Mtexels/sec
Difference: 143104 (132%)

Pixel Rate

The Radeon RX 6600 XT should be much (about 363%) more effective at anti-aliasing than the Radeon R9 280X, and capable of handling higher resolutions while still performing well. (explain)

Radeon RX 6600 XT 125952 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 98752 (363%)

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 R9 280X

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 R9 280X Radeon RX 6600 XT
Manufacturer AMD AMD
Year October 2013 August 2021
Code Name Tahiti XTL Navi 23 XT
Memory 3072 MB 8192 MB
Core Speed 850 MHz 1968 MHz
Memory Speed 6000 MHz 4000 GB/s
Power (Max TDP) 250 watts 160 watts
Bandwidth 288000 MB/sec 262144 MB/sec
Texel Rate 108800 Mtexels/sec 251904 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 125952 Mpixels/sec
Unified Shaders 2048 2048
Texture Mapping Units 128 128
Render Output Units 32 64
Bus Type GDDR5 GDDR6
Bus Width 384-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 11060 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the 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 most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon R9 280X

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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