yes mate, some of these 4870x2's will run up to 1000mhz on the ram. as you can see mine is bang on its limit for 06 at those clocks she just will not play over 820/930 only thing left for me to try is remove the cooler and resit it with new tim etc, but i have a feeling its at its best, ive had several x2's and some clock nice some dont regardless of what you do, luck of the draw really.
very nice mem clocks there, what happens when you push the gpu clock too?