If you are considering upgrading to BIOS 3016 please be aware that it is terribly unstable and filled with bugs (eg. it won't let you name OC profiles, automatically sets bananas voltages, crashes a lot).
After experiencing severe stability issues on a previously rock-solid 4.7GHz 6600K OC, I found the following:
VCCSA on AUTO was delivering 1.35V (expected 1.05 - 1.25) VCCIO on AUTO was delivering 1.35V (expected 0.95 - 1.25)
I checked that XMP was disabled (it was) and adjusted VCCSA to 1.15 and VCCIO to 1.115 - stability problems resolved. Runs much hotter than is used to (mobo chipset and CPU are about +10C) on same settings as previous BIOS.
I contacted ASUS tech support via my ASUS Account. I told them about the problem I had, how I partially resolved it, and asked if ASUS was aware of the issue and when we could expect a fix. The response I got seemed to have come from a social media team member rather than a tech and they seemed to not understand the issue. I gave up on them.
Downgrading Z170 Pro Gaming BIOS is not safely possible and it lacks the fail-safe of ASUS BIOS Flashback.
Anyway, if you're thinking of upgrading to BIOS 3016 - don't unless you absolutely need to. I don't usually upgrade the BIOS on stable systems, but this time I was hoping to resolve an issue I have booting my Z170I with more than one DIMM of RAM and landed in this mess.
P.S. Who would you recommend as a mobo vendor that does good boards and has good after sales service? I've gone right off ASUS following this and other customer service experiences with them.
