looking good. just received.
overclocked to 700, getting 14.5 ksol average. no rejected shares mining btg on miningpoolhub. running 57c on pcb and 72c on chip in my warm shed.
From observations, you don't gain much beyond 650, it ends up around 14.5-15kh/s regardless. There is some other limit in the system which prevents it from doing more, may CPU/RAM limitation.