which version of the card?
Which program did you use to overclock? MSI afterburner only shows the difference from stock or is there a way to read it that I'm not seeing?
i have the g4 gaming
before i watercooled it i ran it at 1500mhz boost and 7600 to 7800mhz on the memory
every card will overclock a little differently but some where close to that should be about what to aim for