I went through the first post when I got the r808's. I see the core voltage is controlled by the pot, that's fine. What do the jumpers do? I see no reference for them?

Command line control was easy for changing freq speeds and step up times, I just wrote a config file. Like I said initially, nice little unit, easy to manage, I just want to push the envelope a bit, get 275mhz down to an operating temp of around 35/40 degrees C and then run up from there. I can monitor actual core temp via the USB I believe. I would have to look up the command.

Is there any way to increase clock frequency above 275mhz other than command line or possibly changing hardware? Is there a firmware "governor" on the unit, so the frequency cannot be increased past 275mhz?

Cheers