Thanks for the details guys
About temps, the DFI based boards are known to be very buggy in this department. They keep adding different offsets for some reason.
About multis, many report buggy multi and special add voltage changes, if any even with the 4/15 latest. I've seen the problem before.
About C1 errors with many different RAM, DFI has this problem on the X38 too.
About CPU-NB linked Achim, they are independent, both voltages and planes are unlinked - its the same as your Core voltage and HT voltage is unlinked, different source. I had verified with Sami late November on here, that one should not affect the other in voltage/speed. I have never observed any link yet to date, stable at x voltage was stable at x voltage even if I increased/decreased CPU speed. Recheck your RAM timings are equal on all runs though but what you're saying confuses me

What voltages do you guys need for your stable settings? also only list settings where system has been on for at least 8-9 hours not under full continuous load. P95/EVEREST/Sandra/OCCT/Orthos/AOD doesn't show stability for any Phenom I've had so far and many users are reporting the same across many boards, it does show load stability though. Most of my completely unstable settings can be ran for a few hours without failing when using for Firefox etc after some stability testing. From 1.4v 3069MHz all the way down to 2800MHz. Stable is daily use without problems.