Is it possible to increase Avalon Mini frequency beyond 375?

[kervinmarketing]

I just set up an 4 module Avalon Mini 60GH asic at frequency 375. In open WRT it is pretty consistently hashing at 55GH. In BTC Guild dashboard, it is usually around 50GH. My temps are peaking around 45, so there seems to be plenty of safe room to play with before the cutoff of 70. Is there anyway to increase the chip frequency beyond 375? When I try, it stops mining until I reduce it to 375 again.