I do this at work. If you don’t do pass through for the NICs I’d highly suggest it. When it’s a router it’s insane how much the overhead can be.

We have a 4 gig connection and with the virtual nics got maybe just over 1gbit on a Xeon silver based R640. But after pass through solid 3.5ish. Not sure where the bottleneck is currently, but our other servers do >4 just fine.