Testing with open-source Nouveau GPU driver instead of the closed-source Nvidia one.
KDE Plasma 5.14.4: AMD Ryzen Threadripper 2990WX 32-Core testing with a ASUS PRIME X399-A (0808 BIOS) and NVIDIA GeForce GT 710 1GB on Slackware 14.2 x86_64 via the Phoronix Test Suite.