You're not. The fastest these Asus routers can achieve with WireGuard is around 400 Mbps, due to the fact that routing has to be done without hardware acceleration - the bottleneck becomes the router's capacity to route traffic rather than the CPU's ability to encrypt traffic. If you see 700 Mbps, then I suspect that traffic is not using the VPN.that wouldn't be ideal in my case, I'm getting 700+ mbits with wireguard