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Geforce GTX 1080 Ti vs Radeon RX 6800 XT

Intro

The Geforce GTX 1080 Ti comes with a core clock frequency of 1480 MHz and a GDDR5X memory frequency of 1376 MHz. It also uses a 352-bit bus, and makes use of a 16 nm design. It is comprised of 3584 SPUs, 224 TAUs, and 88 Raster Operation Units.

Compare those specifications to the Radeon RX 6800 XT, which has a clock frequency of 1825 MHz and a GDDR6 memory speed of 2000 MHz. It also uses a 256-bit memory bus, and uses a 7 nm design. It is comprised of 4608 SPUs, 288 TAUs, and 128 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 1080 Ti 250 Watts
Radeon RX 6800 XT 300 Watts
Difference: 50 Watts (20%)

Memory Bandwidth

In theory, the Radeon RX 6800 XT should be 6% faster than the Geforce GTX 1080 Ti in general, due to its higher bandwidth. (explain)

Radeon RX 6800 XT 524288 MB/sec
Geforce GTX 1080 Ti 495616 MB/sec
Difference: 28672 (6%)

Texel Rate

The Radeon RX 6800 XT is much (about 59%) more effective at texture filtering than the Geforce GTX 1080 Ti. (explain)

Radeon RX 6800 XT 525600 Mtexels/sec
Geforce GTX 1080 Ti 331520 Mtexels/sec
Difference: 194080 (59%)

Pixel Rate

The Radeon RX 6800 XT is much (approximately 79%) faster with regards to full screen anti-aliasing than the Geforce GTX 1080 Ti, and also capable of handling higher screen resolutions better. (explain)

Radeon RX 6800 XT 233600 Mpixels/sec
Geforce GTX 1080 Ti 130240 Mpixels/sec
Difference: 103360 (79%)

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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Geforce GTX 1080 Ti

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 Geforce GTX 1080 Ti Radeon RX 6800 XT
Manufacturer nVidia AMD
Year March 2017 November 2020
Code Name GP102 Navi 21
Memory 11264 MB 16384 MB
Core Speed 1480 MHz 1825 MHz
Memory Speed 11008 MHz 4000 GB/s
Power (Max TDP) 250 watts 300 watts
Bandwidth 495616 MB/sec 524288 MB/sec
Texel Rate 331520 Mtexels/sec 525600 Mtexels/sec
Pixel Rate 130240 Mpixels/sec 233600 Mpixels/sec
Unified Shaders 3584 4608
Texture Mapping Units 224 288
Render Output Units 88 128
Bus Type GDDR5X GDDR6
Bus Width 352-bit 256-bit
Fab Process 16 nm 7 nm
Transistors 12000 million 26800 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.6

Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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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Geforce GTX 1080 Ti

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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