Real Time Peak

Hi guys,
I build very powerful PC recently. But I’m sill having Real Time Peak problem with my Cubase 9?
not with all VSTs but some of them such as omnisphere, Stratus 3, Kentick, some instrument within Halion.
I need your advise please.

PC Specs:
CPU: core i9-7980EX 18 cores
Memory: 64 GB
3 TB SSD
GPU: Nvidia RTX 2080Ti

Hi,

Test your system by using LatencyMon utility, please.