I have a vapor x 4890 on the way and its default clocks are 850 core and 950 memory. I would like to overclock both of those to 1000 mhz each. Do you think that is plausible without upping any voltages? And if it ends up artifacting on me if i went too high can it damage the card? I heard as long as you dont mess with any of the voltages your fine. True or no?