I am using Cubase 8.5 and MOXF 8 as the audio interface. Recently, Cubase is constantly process-overload and cannot export any mixdown. This situation resolved when swapped to a different interface, a Zoom H2n in my case. However, MOXF8 is my main sound source so I definitely want to fix this. I tried a different USB cable which doesn't work either.
I had the same problem 3 months ago. I solved it by changing the hard disk to an SSD. Wonder if this is a MOXF problem or a combination of PC and MOXF.
My computer specs:
Yamaha USB Driver 1.9.10