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Radeon R9 280X vs Radeon RX 6650 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 features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon RX 6650 XT, which has a GPU core clock speed of 2055 MHz, and 8192 MB of GDDR6 memory running at 2190 MHz through a 128-bit bus. It also is comprised of 2048 SPUs, 128 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6650 XT 176 Watts
Radeon R9 280X 250 Watts
Difference: 74 Watts (42%)

Memory Bandwidth

In theory, the Radeon R9 280X should be just a bit faster than the Radeon RX 6650 XT in general. (explain)

Radeon R9 280X 288000 MB/sec
Radeon RX 6650 XT 287072 MB/sec
Difference: 928 (0%)

Texel Rate

The Radeon RX 6650 XT is a lot (more or less 142%) faster with regards to AF than the Radeon R9 280X. (explain)

Radeon RX 6650 XT 263040 Mtexels/sec
Radeon R9 280X 108800 Mtexels/sec
Difference: 154240 (142%)

Pixel Rate

The Radeon RX 6650 XT will be much (approximately 384%) faster with regards to full screen anti-aliasing than the Radeon R9 280X, and capable of handling higher screen resolutions better. (explain)

Radeon RX 6650 XT 131520 Mpixels/sec
Radeon R9 280X 27200 Mpixels/sec
Difference: 104320 (384%)

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

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 R9 280X Radeon RX 6650 XT
Manufacturer AMD AMD
Year October 2013 May 2022
Code Name Tahiti XTL Navi 23
Memory 3072 MB 8192 MB
Core Speed 850 MHz 2055 MHz
Memory Speed 6000 MHz 4380 GB/s
Power (Max TDP) 250 watts 176 watts
Bandwidth 288000 MB/sec 287072 MB/sec
Texel Rate 108800 Mtexels/sec 263040 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 131520 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: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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Radeon R9 280X

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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