Have you been able to overclock with minepeon? If so can you provide instructions/command that is needed
I used bfgminer as the default miner in minepeopn latest 2.5.0 pr1 pre-release, with the same parameters as shown in this thread in the settings page and it seemed to be overclocking to similar rates as in Windows. I don't have minepeon running now, so can't quote the exact command, however I basically copied it from my win settings.
Cheers