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Radeon RX 6800 vs Radeon RX 6800 XT

Intro

The Radeon RX 6800 has core speeds of 1700 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 3840 SPUs as well as 240 Texture Address Units and 96 ROPs.

Compare those specifications to the Radeon RX 6800 XT, which uses a 7 nm design. AMD has set the core speed at 1825 MHz. The GDDR6 RAM runs at a frequency of 2000 MHz on this particular model. It features 4608 SPUs along with 288 Texture Address Units and 128 ROPs.

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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 the exact same memory bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The Radeon RX 6800 XT should be much (more or less 29%) better at texture filtering 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 a lot (about 43%) faster with regards to anti-aliasing than the Radeon RX 6800, and also able to handle higher screen resolutions without losing too much performance. (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

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.

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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum 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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