My best is 1100 core and 2050 memclock.
Bios mode or -strap 1 in phoenix and You`ll get 29.9-30.5Mhash.
It`s power setting`s. Somme gpu`s can handle it at 750mv, somme at 850(samsung hynix memory)
I'm using nanominer (since claymore is wonked) and I can't find anything on -strap and -rxboot for it.
Which miner are you using?
Thanks in advance to anyone that can help me to get back to 31mh (sigh)