Ok. So my E8400 is stable at 4000 Mhz on 1.26 Vcore. I'm having trouble going over 4000 though. The problem is that I can't seem to stabilize a 4200 Mhz overclock on any voltage up to and including 1.31 Vcore. The other issue I'm having is that no matter what setting I change in the bios, whether it be the VID or the VID special add, the voltage won't go above 1.31 until I hit a spot at around 1.34 Vcore. WHen I got it to finally boot at 1.34 and tried to run stress tests, I got BSOD within a few minutes. Any suggestions? Also posted this on the DFI x48 page as well.

Here are the settings I was usiing for 4200 Mhz
Vcore - 1.34 - (CPU VID @ 1.2375 + VID Special add @ about 108.2%)
CPU VTT 1.2
NB volts - 1.405
SB Volts - 1.65
VDIMM 2.1
Ram timings - 5-5-5-18