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Geforce GTX 1080 Ti vs Radeon RX 6900 XT

Intro

The Geforce GTX 1080 Ti uses a 16 nm design. nVidia has clocked the core frequency at 1480 MHz. The GDDR5X memory works at a frequency of 1376 MHz on this model. It features 3584 SPUs as well as 224 TAUs and 88 Rasterization Operator Units.

Compare all of that to the Radeon RX 6900 XT, which has core speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 5120 SPUs along with 320 TAUs and 128 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 1080 Ti 250 Watts
Radeon RX 6900 XT 300 Watts
Difference: 50 Watts (20%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6900 XT should theoretically be just a bit better than the Geforce GTX 1080 Ti in general. (explain)

Radeon RX 6900 XT 524288 MB/sec
Geforce GTX 1080 Ti 495616 MB/sec
Difference: 28672 (6%)

Texel Rate

The Radeon RX 6900 XT is a lot (more or less 76%) faster with regards to anisotropic filtering than the Geforce GTX 1080 Ti. (explain)

Radeon RX 6900 XT 584000 Mtexels/sec
Geforce GTX 1080 Ti 331520 Mtexels/sec
Difference: 252480 (76%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6900 XT is the winner, by a large margin. (explain)

Radeon RX 6900 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

Check prices at:

Radeon RX 6900 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 Geforce GTX 1080 Ti Radeon RX 6900 XT
Manufacturer nVidia AMD
Year March 2017 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 584000 Mtexels/sec
Pixel Rate 130240 Mpixels/sec 233600 Mpixels/sec
Unified Shaders 3584 5120
Texture Mapping Units 224 320
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 (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, 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 the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Geforce GTX 1080 Ti

Amazon.com

Check prices at:

Radeon RX 6900 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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