Cubase 11 - Audio Process OverLoad

Hi ,
When I upgraded my Cpu from I5-750 (4 core 4 thread ) to I7-4770 (4 core 8 thread ). I open the same project as before, but the Audio-Processing-Load increase a lot compared to before. Then I play back the entire project, I heard audio clips sound very often. I wonder how can I resolve this issue.

forgot to say: Windows upgraded from 2019H2 to 2020H2