I'd like to fine tune my 7970

[kanta]

I see others posting that they exceed 720 MH/sec and I'm averaging 711.  I know 9 MH/sec isn't really anything, but I like to squeeze every last bit of performance out that is practical.  I bought this card for gaming, but when I'm not home (I work 12 hour shifts) or asleep I let GUIminer do its thing.  Card is a Sapphire Vapor-X 7970 GHz Edition overvolted to 1300mV, GPU clock is 1230 and mem clock is 1600.  Flags are -v -w 256.  Thanks in advance