Supermicro H12DGQ-NT6 User Manual page 44

H12DGQ-NT6 User's Manual
Question: For the AMD EPYC platform, we found that the Windows Server 2012/2016
OS would not install properly. It however works fine with Linux OS, any suggestions?
Answer: This issue is due to Windows server OS' compatibility with the virtualization function,
we suggest to disable IOMMU (Input/Output Memory Management Unit) before installing the
Windows Server OS. After installing the OS and hot fix update is finished, then you could
enable the IOMMU in BIOS.
BIOS >> Advanced >> NB Configuration >> IOMMU >> Change from Auto to Disabled.
Microsoft KB: 4022723
Enabled machines with AMD I/O Virtualization Technology (IOMMU) to boot without BIOS
restriction.
https://support.microsoft.com/en-us/help/4022723/windows-10-update-kb4022723
Question: Why did the system freeze and fail to begin installation when I tried to install
Windows Server 2016?
Answer: Windows Sever 2016 support is limited to less than 255 logical processors, and it
does not support x2APIC. Follow the steps to solve the problem.
1. Disable SMT in BIOS. (BIOS >> Advanced >> CPU Configuration >> SMT Control >>
Disabled)
2. Set the option of Local APIC Mode to be xAPIC in BIOS. (BIOS >> Advanced >> CPU
Configuration >> Local APIC Mode >> xAPIC)
3. Install Windows Server 2016 again.
44