OSs Supporting UEFI Boot Mode

The ECS boot mode can be BIOS or UEFI. For details about the differences between them, see How Is BIOS Different from UEFI?

Table 1 lists the OSs that support the UEFI boot mode.

**Table 1** OSs supporting UEFI boot mode
OS	Version
Windows	Windows Server 2025 Standard/Datacenter 64bit Windows Server 2022 Standard/Datacenter 64bit Windows Server 2019 Standard/Datacenter 64bit Windows Server 2016 Standard/Datacenter 64bit Windows Server 2012 R2 Standard/Datacenter 64bit Windows Server 2012 Essentials R2 64bit Windows Server 2012 Standard/Datacenter 64bit Windows 11 64bit Windows 10 64bit
Ubuntu	Ubuntu 24.04 Server 64bit NOTE: Ubuntu 24.04 uses the AVX instruction set only in C7n, S7n, and M7n ECSs. Ubuntu 22.04 Server 64bit Ubuntu 20.04 Server 64bit Ubuntu 19.04 Server 64bit Ubuntu 18.04 Server 64bit Ubuntu 16.04 Server 64bit Ubuntu 14.04 Server 64bit
Red Hat	Red Hat Linux Enterprise 7.4 64bit Red Hat Linux Enterprise 7.3 64bit Red Hat Linux Enterprise 7.1 64bit Red Hat Linux Enterprise 7.0 64bit Red Hat Linux Enterprise 6.9 64bit Red Hat Linux Enterprise 6.6 32bit Red Hat Linux Enterprise 6.5 64bit
Oracle Linux	Oracle Linux Server release 7.4 64bit Oracle Linux Server release 6.9 64bit
openSUSE	openSUSE 42.1 64bit
SUSE	SUSE Linux Enterprise Server 15 SP7 64bit SUSE Linux Enterprise Server 15 SP6 64bit SUSE Linux Enterprise Server 15 SP5 64bit SUSE Linux Enterprise Server 15 SP4 64bit SUSE Linux Enterprise Server 15 SP3 64bit SUSE Linux Enterprise Server 15 SP2 64bit SUSE Linux Enterprise Server 15 SP1 64bit SUSE Linux Enterprise Server 15 64bit SUSE Linux Enterprise Server 12 SP5 64bit SUSE Linux Enterprise Server 12 SP4 64bit SUSE Linux Enterprise Server 12 SP3 64bit SUSE Linux Enterprise Server 12 SP2 64bit SUSE Linux Enterprise Server 12 SP1 64bit SUSE Linux Enterprise Server 11 SP3 64bit
Fedora	Fedora 24 64bit
Debian	Debian GNU/Linux 8.8.0 64bit
CentOS	CentOS 7.4 64bit CentOS 7.0 64bit CentOS 6.9 64bit CentOS 6.6 64bit
EulerOS	EulerOS 2.3 64bit EulerOS 2.2 64bit