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Radeon RX 6800 vs Radeon RX 6800 XT

Intro

The Radeon RX 6800 uses a 7 nm design. AMD has clocked the core speed at 1700 MHz. The GDDR6 memory is set to run at a frequency of 2000 MHz on this model. It features 3840 SPUs as well as 240 Texture Address Units and 96 Rasterization Operator Units.

Compare those specs to the Radeon RX 6800 XT, which features core clock speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 4608 SPUs along with 288 Texture Address Units and 128 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 250 Watts
Radeon RX 6800 XT 300 Watts
Difference: 50 Watts (20%)

Memory Bandwidth

Both cards have exactly the same memory bandwidth, so theoretically they should perform exactly the same. (explain)

Texel Rate

The Radeon RX 6800 XT is a lot (approximately 29%) better at AF than the Radeon RX 6800. (explain)

Radeon RX 6800 XT 525600 Mtexels/sec
Radeon RX 6800 408000 Mtexels/sec
Difference: 117600 (29%)

Pixel Rate

The Radeon RX 6800 XT is quite a bit (approximately 43%) faster with regards to FSAA than the Radeon RX 6800, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800 XT 233600 Mpixels/sec
Radeon RX 6800 163200 Mpixels/sec
Difference: 70400 (43%)

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 RX 6800

Amazon.com

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Radeon RX 6800 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 RX 6800 Radeon RX 6800 XT
Manufacturer AMD AMD
Year November 2020 November 2020
Code Name Navi 21 Navi 21
Memory 16384 MB 16384 MB
Core Speed 1700 MHz 1825 MHz
Memory Speed 2000 GB/s 2000 GB/s
Power (Max TDP) 250 watts 300 watts
Bandwidth 524288 MB/sec 524288 MB/sec
Texel Rate 408000 Mtexels/sec 525600 Mtexels/sec
Pixel Rate 163200 Mpixels/sec 233600 Mpixels/sec
Unified Shaders 3840 4608
Texture Mapping Units 240 288
Render Output Units 96 128
Bus Type GDDR6 GDDR6
Bus Width 256-bit 256-bit
Fab Process 7 nm 7 nm
Transistors 26800 million 26800 million
Bus PCIe 4.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.6 OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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Radeon RX 6800

Amazon.com

Check prices at:

Radeon RX 6800 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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