4U Rackmount. Socket SP3. CPU Socket. Windows Server 2016 ( X2APIC/256T not supported)Windows Server 2019Windows Server 2022Red Hat Enterprise Linux 8.3 ( x64) or laterRed Hat Enterprise Linux 9 ( x64) or laterSUSE Linux Enterprise Server 12 SP5 ( x64) or laterSUSE Linux Enterprise Server 15 SP2 ( x64) or laterUbuntu 18.04.5 LTS (x64) or laterUbuntu 20.04 LTS (x64) or laterUbuntu 22.04 LTS (x64) or laterVMware ESXi 6.7 Update3 P03 or laterVMware ESXi 7.0 Update1 or laterCitrix Hypervisor 8.2.0 or later.