I’ve been working with my UR22 along with Cubase AI 7 and never had a problem, even when I was using an older computer. My current setup is:
MSI g43-z87 board
I recently started using Kontakt libraries, some of which must be heavy on the CPU, but I was expecting better performance. My recent projects (8-10 instrument tracks and 6-8 audio tracks) are impossible to edit as I get a lot of CPU peaks. I tried every buffer size, reset all preferences and reinstalled drivers for the UR22, still the same.