I have near gigabit internet service (900Mbps down / 180Mbps up - FTTH - GPON terminated on ISP's ONT) and PPPOE on OPNsense connected to CAT5E on ONT. I get full download speed using a Dell Wyze 5070 Extended which has 8gb RAM and a Pentium Silver J5005 CPU (4 x 1.5 GHz with boost to 2.8 GHz). When downloading 900Mbps the total CPU usage is about 34%.
Really all I'm wanting to know is...what minimum CPU (single core speed) would I need for this application? Would a modern dual core @3GHz be sufficient? Higher? Lower? Would a high speed Celeron work? Or Pentium? Or Core i needed? AMD something?