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Radeon R9 280X vs Radeon RX 6600 XT

Intro

The Radeon R9 280X uses a 28 nm design. AMD has clocked the core frequency at 850 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Compare those specifications to the Radeon RX 6600 XT, which has clock speeds of 1968 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

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

The Radeon R9 280X should theoretically be a small bit faster than the Radeon RX 6600 XT overall. (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 quite a bit (more or less 132%) better at anisotropic 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 is quite a bit (more or less 363%) better at FSAA than the Radeon R9 280X, and also capable of handling higher resolutions better. (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 transferred past the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 are processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling 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 that 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 number of colour ROPs 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 is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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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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