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Radeon R9 280X vs Radeon RX 6650 XT

Intro

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

Compare all of that to the Radeon RX 6650 XT, which has 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 TAUs 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 R9 280X 250 Watts
Difference: 74 Watts (42%)

Memory Bandwidth

The Radeon R9 280X, in theory, should perform a bit faster than the Radeon RX 6650 XT overall. (explain)

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

Texel Rate

The Radeon RX 6650 XT should be a lot (more or less 142%) more effective at anisotropic filtering 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 should be much (about 384%) better at AA than the Radeon R9 280X, and also should be capable of handling higher resolutions more effectively. (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

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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: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 amount of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 - the lower the bandwidth is, the lower the ability to reach the max 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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