I use rivatuner although coolbits would be fine too. Rivatuner is just more advanced as far as settings go....either way it's raising 3d modes core and memory that's the same and all, but I like rivatuners hardware monitor and things like that.
I got mine running driver based 400/1100 right now, Ultra settings according to eVGA although I have seen some cards run 425/1100 that are ultras. Last time I tried my memory maxed out at 1175, but it's had a lot of time to burn in now, plus I got some ramsinks so when water cooling comes I'm hoping for like 450/1200 that'd be nice