Let me tell you that not all cards overclock the same, even if it is the exact same model. There are 7950's that get around 1250-1300mhz but you'll have to be real lucky with the card you get. If you are maxing the volts and the cooling is good and you still can't reach 1300mhz then it won't be possible. Try to find your max overclock. 1300mhz is a real nice clock with great performance but only very few make it that far.