Admittedly, AMD Ryzen is certainly looking better with each day that passes. Over at CES there are demo systems running and they run 8-core Ryzen Processors with a 3.6 GHz base and 3.9 GHz Turbo.
Previously AMD openly announced a minimal base clock of 3.4 GHz, and that was merely weeks ago. Apparently the new demo systems at CES are revision 3 of the processor, even more intersting is that french based Canard PC already is mentioning a revision 4 with a Turbo at 4.0 GHz (and a 3.6 GHz base).
Nothing is officially confirmed by AMD I guess, but the guys from HardwareLuxx managed to snag a photo of that third iteration, click on the thumbnail to enlarge and to see that aforementioned 3.9 GHz turbo, as that is looking mighty interesting :)
AMD 8-core Ryzen Processor spotted running 3.6 GHz base and 3.9 GHz Turbo