Thanks to everyone for the tips and suggestions. I thought I'd write a quick update to say it's all sorted now. tl;dr: Ryzen 3 with Vega works just fine on 5.4.x series kernels. I started shopping around for the cards Paul mentioned but couldn't find versions with that chipset but without fans for the Radeon and the nVidia route also turned up blanks. Luckily, one of my machines is a work from home machine and I managed to bag an nVidia Quadro K1200 from the stores at work. Four DP outputs and it seems much more performant. That's the one with more monitors, but not the low latency kernel. The studio machine has a 4K display and couldn't use the nVidia drivers because of the RT kernel patches. Turns out though that the solution was staring me in the face: this is a Ryzen 3 motherboard and apparently has built in graphics. It didn't work when I first built the machine but upgrading to the latest kernel (5.4.x) all now seems good and the performance is the best I've had from ardour, and that's running full screen at 4K. I can scroll! Anyway, seems that the Vega 8 (Ryzen built-in) graphics option is more than adequate so if anyone reads this thread looking for answers, that's another option. bjb On Sun, Mar 29, 2020 at 10:43:44AM +0100, Ben Bell wrote: