Mine seems to max out at 1260. Any more than that and whatever I'm playing just seems to crash. The memory, however, doesn't seem give a damn what I do to it. I'm at +750 right now and it doesn't show any signs of stopping; there's no artifacts and the highest temperature I've hit is 69C with the fan on auto. The power limiter doesn't seem to do anything for me either. It doesn't affect my overclock at all so I just keep it at 100%.