v6 rc3 on routerboard nv2 throughoutput drop 40mbit to 19mbi

RouterOS General
1

I had ros v5.21, throughotput on nv2 was 40mbit/s, after upgrade to v6, rc3 throughoutput about 19mbit/s.
Dont recommend to use v6 for nv2 links…also nstreme, much worse performance - about 7mbit/s.