Hello!
The CPU of 10 Gbit/s servers does not have high load on average and the 10 Gbit/s servers have repeatedly reached more than 12 Gbit/s peak performance (6 up + 6 down). They also have quite a remarkable average, for example Haedus on weekends keeps an impressive 8 Gbit/s averaged on the 48 hours! OpenVPN surely loads the CPU, that's unavoidable, but we're topping CPU capacity only when the total amount of connected clients exceed 300, which normally should not happen: Eddie will not recommend connection to servers with approaching to limit connected clients and our areas FQDN will not resolve to those servers' IP addresses.
As a side note, consider that the 10 Gbit/s servers marked with "6000 Mbit/s" maximum bandwidth are connected to a 10 Gbit/s port but with our plan the provider guarantees 3 Gbit/s full duplex 24/7, while they are "best effort" burstable to 10 Gbit/s.
Kind regards