I use 18.6.1.
CC: 1407 MHz
MC: 900 MHz (hynix memory - very unstable over ~910 on cn7, cn8)
HR cn pico turtle = ~14880 H/s
{
"cryptonight_type" : "turtle",
"intensity" : 0,
"double_threads" : true,
"shutdown_temperature" : 77,
"off_temperature" : 77
}