I flashed the new 809 bios and when I loaded my old bios o/c profile, there were a couple of changes in the settings somehow. The SB voltage was set to 1.20v, while I had saved as Auto in old bios profile. Also the NB voltage register was set to .61x, while it was saved as Auto. Also the ram timings had changed from what I hat previously set, default 5-6-5-15-25 rather than the saved 5-5-5 in the profile.
My system was stable before at 4.0GHz, but perhaps there is a reason why these new voltage settings appeared in my bios profile. I tried them, and sure enough I eked a higher o/c to 4.1GHz, coupled with my modest voltage settings it is stable so far.
E8400 bios 809
CPU: 1.365v
PLL: 1.50v
VTT (FSB Term): 1.10v
Ram: 2.1v
NB: 1.25v
NB voltage reg: .61x
SB: 1.20v
Load Line Calb: enabled
CPU voltage reg: auto
Clock overchg: auto
Transaction boost: disabled -relax lvl 0 (was Performance Lvl 6, now is Lvl 9 with new bios)
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