Hi @Arspen
Let’s see…
To correct the EXCEPTION_ILLEGAL_INSTRUCTION exception in your Proxmox VM for Unreal Engine with GPU passthrough, follow these instructions:
CPU Model Configuration:
Deploy cpu: host,hidden=1 to your Proxmox VM configuration in order to passthrough more features from your host CPU.
Try different CPU models (e.g., qemu64, kvm64, or sandybridge) in order to avoid compatibility problems with Unreal Engine.
Check CPU Features:
Ensure AVX and AVX2 are being passed properly, and also verify Unreal Engine isn’t trying to utilize unsupported instructions (e.g., AVX-512).
Windows 11 Compatibility:
Make sure your VM is configured to support Windows 11 features like TPM and Secure Boot.
Unreal Engine Settings:
Update Unreal Engine to the newest build.
Tune settings within Unreal Engine, such as setting the renderer or disabling optimizations.
Proxmox Version & Virtualization Extensions
Ensure your Proxmox version is updated, with CPU virtualization extensions enabled (vmx for Intel).