Yes, 550 MHz, Chip temp is below 70C and ambient is close to 100F in the garage.

cool, whats a good pool for sumo?

Any pool from the list should do, I picked one with decent number of miners.

http://www.sumopools.com/

Thanks for the heads up, I joined a German pool with .1 fee. (they have 33 miners) Seems to be going ok, I also overclocked 550.

cheers

Found a better pool, paying 9.7 US daily. running 360 Kh/s, sorry GPU suckers