I have a problem when installing vmware esxi 6.5 ??

[ahmedalsyda]

[RickVerstegen]

I think your hardware is unsupported. Did you check the VMware HCL?

[vijayrana968]

What is the processor model.

[Vijay2027]

verify vmware hardware compatibility guide:

https://www.vmware.com/resources/compatibility/search.php

[diegodco31]

Most likely your hardware is not supported.

VMware Compatibility Guide - System Search

Enter your model here

Please consider marking this answer "correct" or "helpful" if you think your question have been answered correctly.

[sk84]

As others have already mentioned here, a Dell Optiplex 755 is not a suitable hardware platform for ESXi. However, it is possible to install ESXi on these machines, but you probably need a different CPU.

The error message looks like a CPU is installed that is no longer supported or accepted by ESXi 6.5. See the release notes for a list of unsupported CPUs for ESXi 6.5:

VMware vSphere 6.5 Release Notes

And you may find more information in the Dell communities:

Optiplex 755 and ESXi 6.5 Core 2 CPU Compatibility - Dell Community

[RAJ_RAJ]

Check this , it may helpful

Optiplex 755 and ESXi 6.5 Core 2 CPU Compatibility - Dell Community