Well.. I won't remember everything but, a few things I did wrote down:
vCore: 0.230+
vQPI: 0.220+
PLL: auto
PCIE@ 37.3
Disable spread spectrum
EIST disabled
C-state disabled
Turbo boost disabled
QPI: fullspeed
Leave it at 4.8gt
Anyway.. it was worthless. I remember it crashed just a few minutes after that screen shot. That was the closest to 4GHz stability ever with this board.
If you want to find the stability point on the range of 3.8~2.9Ghz, I suggest you use the 19x mult, and up the vQPI a lot, all up to about 0.230+. This also helps to save some vCore against the 20x mult.
My settings for 3.8Ghz are: vcore 0.080+, qpi 0.160+
For 3.9GHz: vcore 0.110+, qpi 0.220+
Both with HT off. With HT on it requires way much more vcore.
PS: This two settings are 20x Linx stable.