Confirmed, using 375 MHz and 37 timeout is hashing at about 200 Ghash/s
option 'freq_value' '4e81' #375M
option 'chip_freq' '375'
option 'timeout' '37'
interesting that 400MHz gets the same speed then...?
also, i tried the 425MHz code and was getting around 185-190GHash and semingly more errors, so i backed off to 400