Differences and Benefits Between i440fx and q35 in Proxmox
For application i440fx is enough, and it is simple, for hardware related, such as GPU passthru, then Q35 is better.
Switch between them
After switch between, the network interface name will be changed.
Q35 supports PCIe
- Extended configuration space (MMCFG)
- PCIe native hotplug
- Advanced Error Reporting (AER)
- Alternative Routing-ID Interpretation (ARI)
- Native Power Management
- Function Level Reset (FLR)
- Address Translation Services (ATS)
- AHCI storage controller
- vIOMMU emulation
- Secure Boot
- No support for legacy guests (Windows XP/2000).
- Questionable support for legacy QEMU devices.
- Limited IO space can affect the number of devices used by a single Q35 machine