So current settings are full power, 84C temp target, +200 core, +100 mem. Haven't really tried to push the mem yet.
So compared to my overclocked 680:
680 (+120/+400)
Batman AO: 33/94/61 min max avg
Heaven 4: 981
780 Phantom stock
Batman AO: 48/102/71 min max avg
Heaven 4: 1347
780 Phantom +200c/+100m
Batman AO: 60/113/79 min max avg
Heaven 4: 1565
So to clarify (thanks Suarez) that means the core is 1254 and mem is 3105
Nice overclock on stock. How hot is your card?