Update to bios 1.9b5 or greater at this site...
http://www.lejabeach.com/MSIK8N/k8nneo2.html
I booted up my 4400+ X2 with 1.8 bios back about 3 months ago and it ran fine just did not properly recognize the 2nd core....flashed it and I was fine....There are 1.9 and 1A officials so it is not a beta thing.....
One thing I can tell you is these bioses for some reason no longer give you the same vcore....
I set 1.55v and 8.3% and with my winnie it used to give me 1.57-1.58v ut now only give me 1.46-1.48v.....The whole setting does not work and hasn't for a bit...setting at auto set my chip to 1.296v and not 1.35v...It is enough to boot and in most cases likely would run and pass prime95....
1.4-1.5v sets the same vcore regardl;ess of setting..1.525v-1.55v set same vcore as beofre bu .025v more...So now I get 1.32v...still below default vcore....
SO....
I set 1.55v to get 1.32v actual....
tehn I use 3.3% over vid setting toi get 1.36v idle...as close to default as you are likely to get...
The highest I can get is using the 1.55v set and 10% to get 1.5-1.51v idle to about 1.53v load...Basic rule of thumb of 10% means I dont go over 1.5v and that is why I stick with 1.55v set and 8.3%. Also with my XP90c I stay around 51c load 24/7. With the 1.5v-1.53v I hit loads of mid 50's which is likely very safe, butwhy...for 2-3 more HTT?? NO Thanks!!!