turbo boost

Hi I dont understand how work turbo bust in Proxmox. I installed windows on my i5 10400 and had all 6 cores on 4Ggz Now I have proxmox and there 2.7Ggz on all cores. I tried tuned-adm profile throughput-performance and cpupower frequency-set -g performance but cat /proc/cpuinfo |grep "cpu MH"...

Hi, I buy a new system to be used as home server with Proxmox and i saw that cpuinfo report cpu frequency to be 4.0Ghz even when load is 0, while the nominal speed is 2.8Ghz (core i5-8400). I try to play with bios settings with no luck. In the end i boot Ubuntu 18.04 desktop from USB stick and...