@peakee…isnt it like this, i copy from the start of the thread here…"Cubase is the “process”, windows reserves 4 MMCSS threads, leaving 28, Cubase schedules two MMCSS threads per CPU core (real or logical), 28 divided by 2 is…14 logical cores or?..my cpu have 16 logical 8 real cores and i have HT enabled should be 16 logical cores and should be affected…or?..have i missunderstand it?