Multicam Slow - Media Composer 2018

Hi,

We are running:

Media Composer 2018.12.5 on HP Z840 (Windows 10)

Interplay 2018.11 Client & Engine 2018.9

We were previously on Media Composer 8.4.4 and groups were performing great.

Now across Media Composer 2018 (we have been on 2018.5 and 2018.11) switching to multicam mode is noticeably slower and we regularly receive hardware underrun errors when playing back - despite having 64GB of RAM, 10Gb fibre and 36-cores on a qualified z840. Have tried reducing the number of angles (from 20 to 11) without any luck.

Is anyone else having similar issues on the new Media Composer?

Thanks,

Jonathan