Sorry for late reply! Just wanted to give you an update and get some help!
So, I got my 6600k to 4.5GHz @ 1.35v stable via Aida64 Extreme. Haven't actually tested in game yet, but I'm sure it'll be fine when I get around to it. The problem I'm coming across now is that when I enable my XMP to run my memory at it's factory 3200MHz speed, I become unstable in Aida64. The strange thing is that NO settings change when I enable XMP except for the speed itself. No BCLK, no dram voltage, no forced cpu OC... but for some reason it is just unstable.
Anyone have any advice on how I can run my mem at 3200 stable?
Should I bump my dram voltage?
***EDIT*** as for the CPU overclocking, I haven't really tried to go any further with it. I know you said 1.42v max and 90C, but I have read all the paranoid folk's posts about "stay under 1.35 or it's gonna smoke", and I think the paranoia rubbed off lol
So Skylakes are safe for up to 1.42? I really just want to stay on the 95% or more safe side lol