We got a very good overclock out of our PowerColor X700 Pro. On the core we got a hefty 74 Mhz boost from the default 425 to 499 catapulting it past the stock speed of the X700 XT (475). The memory side was even more impressive with the stock memory speed coming in at 864 Mhz. We noted that the memory was rated at 2.0nz (1000 Mhz) so hitting 1000 should not have been a problem and it was not. In fact we were able to push the memory clock all the way up to 1100 Mhz.