System76 has added the AMD Ryzen Threadripper 3990X in the list of configurable options for its Thelio Major desktop. The computer operates on either Ubuntu or Pop!_OS, and it's possible to fit up to two graphics cards inside it, with choices ranging from AMD's Radeon RX 5700 XT to Nvidia's RTX Titan. System76 also shows how the 3990X will shame your current CPU in some handy tests.
https://www.notebookcheck.net/System76-unveils-the-AMD-Ryzen-Threadripper-3990X-powered-Thelio-Major-desktop-with-a-battery-of-comparison-tests-that-will-make-your-CPU-whimper.453537.0.html