If it needs all that just to do 1500mhz I cant see 1500mhz being that commonplace on the AIB versions !
Apparently it is going to be quite a good chance if they bin the chips for the best performance.
https://hardforum.com/threads/first-gaming-benchmarks-up.1903628/#post-1042385515
Kyle Bennet - AIB partners are reporting to me this morning that with extremely good custom air coolers the 480 GPUs are seeing from 1480MHz to 1600MHz clocks, but tell me it is a "lottery draw" on GPUs.