Is it possible, and if it is, how?

I cant see more than 400mhz in System - Routerboard - Settings.

Any thoughts?

Is it possible, and if it is, how?

I cant see more than 400mhz in System - Routerboard - Settings.

Any thoughts?

I'm not sure of that, most of the machines do not provide the option is embedded includes roterboard, why you do not use x86 instead?

Why do you want to overclock it? More often than not, overclocking can cause the router to become unstable. If you need more power you might want to look at upgrading to a more powerful router.