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Radeon R9 280X vs Radeon RX 6650 XT

Intro

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

Compare those specs to the Radeon RX 6650 XT, which has clock speeds of 2055 MHz on the GPU, and 2190 MHz on the 8192 MB of GDDR6 memory. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

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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

As far as performance goes, the Radeon R9 280X should in theory be a little bit better 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 is quite a bit (approximately 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 should be a lot (more or less 384%) faster with regards to AA than the Radeon R9 280X, and also should be capable of handling higher screen resolutions while still performing well. (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

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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 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 transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. 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 many other factors, most notably the memory bandwidth - the lower the 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 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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