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My words were not precise. Their intent was to say that for a MIPS-based SoC, you’re not going to reliably get more than somewhere in the 10-20 Mbps range. There are 400 MHz and even slower MIPS-based SoCs that will probably never get close to 10 Mbps with OpenVPN.

Basically, the rates you’re getting are probably all you can get out of the chip in the device for OpenVPN.

Since the router needs to do more than just run the VPN (receiving packets, deciding where to send them, NAT, sending packets), a 25% slower CPU means more than a 25% slower VPN. I have never tested a device in that speed range for OpenVPN performance, only faster ones.

You can save a little bit when you need the speed by doing things like:

  • Don’t log into the web interface
  • Don’t run anything you don’t need to on your router (file sharing, torrents, … )
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