One of the better more technical reviews I have read thus far is from bit-tech.net, linked earlier by someone. Waited a month on this card coming so another few weeks on AIB models/info isn't a problem.
"Sadly, the reference cooler leaves a lot to be desired. The default 2,200 RPM fan speed limit is quickly reached under load in order to keep the card at its default target temperature of 80°C, and the card is relatively loud at this speed – it's certainly nowhere near as bad as the R9 290X and R9 290 cards were, but compared to what we're used to these days it does still stand out. We found clock speeds were not able to remain at the peak boost speed of 1,266MHz, instead typically floating at closer to 1,200MHz. That said, this appears to be at least as much of a power limitation than a thermal one, as upping the power limit saw 1,266MHz maintained virtually all the time.
As a reminder, we added 9 percent to the core and 12.5 percent to the memory speeds when overclocking. With these new frequencies, we were able to achieve performance increases of between 8 and 16 percent – this is possible because we removed the power and thermal limitations, allowing the card to boost higher more often. Again, this isn't a realistic overclock for everyday use, at least not with this cooler, but it is promising that there appears to be a healthy amount of headroom here."
