Hi
Upon further investigation it is not the CPU or bios settings as
hardware virtualisation is enabled it appears that while VirtualBox
provide an environment to install ESX 6.7.0u3 (which works with AMD
virtualisation) it does not expose enough functionality for the ESX
instance to run a VM. At the office I have access to a Dual AMD Epyc
7302 server running ESX 6.7.0u3 and have run ESX 6.7.0 instances as VMs
without a problem. The key Virtualisation difference between Epyc 7302
and Ryzen 5600 is the Secure Memory encryption (encrypt all memory with
a common key when enabled in the bios is transparent to any operating
system) and Secure Encrypted Virtualisation (encrypt each VM with its
own key).
The basic AMD-V while used by VirtualBox it does not appear to be
exposed within the virtual machine so that ESX can use it.
Thanks
Russell
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