🧩 Problem

I had several Windows VMs running in VMware Workstation 25H2 on my Windows PC and wanted to migrate them across to my ESXi 8 host (esx03) for centralized management under vCenter.

Along the way I hit two blockers in sequence:

1. vmx-22 hardware family not supported during OVF import into ESXi 8

2. vTPM encryption requirement — the VM failed to create because it had a virtual TPM but VM encryption wasn’t configured on the standalone host

🧩 Problem

I attempted to install ESXi 8 on my Dell OptiPlex homelab machine, but during boot, I encountered a Pink Screen of Death (PSOD) with errors like:

• Fatal CPU mismatch on feature
• HW feature incompatibility detected

This prevented ESXi from installing or booting successfully. !

🛠️ Root Cause

The issue is caused by modern Intel CPUs (12th Gen and newer) using a hybrid architecture with:

• Performance cores (P-cores)
• Efficiency cores (E-cores)

ESXi expects uniform CPU cores, so it crashes when it detects different core types.