I have one 5000 MHz stable, but this chip, what i saw in others forum, is better than average 8350s...So if will be lucky, after you can hit 5 GHz stable (or very close to 5 GHz) with Antec or H80 etc.
I think, the chip of Stilt is more than good . Maybe with 1.55V he culd get 5.1 GHz stable.