http://dtyzgbrlozogokiaidoaszcutfiwduzswxdghkd2snonicbux2xudkqd.onion/faq
You may be able to install without the required CPU features for testing purposes only, but VMs (in particular, sys-net) may not function correctly and there will be no security isolation.
For more information, see Qubes-certified hardware . Why is VT-x/AMD-V important? By default, Qubes uses Xen’s PVH and HVM virtualization modes, which require VT-x/AMD-V.
This means that, without VT-x/AMD-V, no VMs will start in a default Qubes installation.