In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 1080 Ti Kuroutoshikou Founders Edition 11GB are very slightly better than the AMD Radeon RX Vega 64 8GB.

The GTX 1080 Ti has a 233 MHz higher core clock speed but 32 fewer Texture Mapping Units than the RX Vega. The lower TMU count doesn't matter, though, as altogether the GTX 1080 Ti manages to provide 12.3 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 1080 Ti has a 233 MHz higher core clock speed and 24 more Render Output Units than the RX Vega. This results in the GTX 1080 Ti providing 50.4 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The RX Vega was released less than a year after the GTX 1080 Ti, and so they are likely to have similar driver support for optimizing performance when running the latest games.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The GTX 1080 Ti has 3072 MB more video memory than the RX Vega, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 1080 Ti also has superior memory performance overall.

The GTX 1080 Ti has 228.4 GB/sec greater memory bandwidth than the RX Vega, which means that the memory performance of the GTX 1080 Ti is massively better than the RX Vega.

The Radeon RX Vega 64 8GB has 4096 Shader Processing Units and the GeForce GTX 1080 Ti Kuroutoshikou Founders Edition 11GB has 3584. However, the actual shader performance of the RX Vega is 6332 and the actual shader performance of the GTX 1080 Ti is 7654. The GTX 1080 Ti having 1322 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 1080 Ti delivers a massively smoother and more efficient experience when processing graphical data than the RX Vega.

The RX Vega transistor size technology is 2 nm (nanometers) smaller than the GTX 1080 Ti. This means that the RX Vega is expected to run very slightly cooler and achieve higher clock frequencies than the GTX 1080 Ti.

The Radeon RX Vega 64 8GB requires 295 Watts to run and the GeForce GTX 1080 Ti Kuroutoshikou Founders Edition 11GB requires 220 Watts. We would recommend a PSU with at least 600 Watts for the RX Vega and a PSU with at least 600 Watts for the GTX 1080 Ti. The RX Vega requires 75 Watts more than the GTX 1080 Ti to run. The difference is significant enough that the RX Vega may have an adverse affect on your yearly electricity bills in comparison to the GTX 1080 Ti.