CPU GTL Voltage Reference (0/2): 0.67x
CPU GTL Voltage Reference (1/3): 0.67x
CPU PLL Voltage: 1.5v
FSB Termination Voltage: 1.2v
NB Voltage: starts at 1.10v. not cpu dependent start with 1.20v, may need up to 1.34v
NB GTL Reference: 0.63x in the specs, 0.65x in my MB with my configuration
SBridge Voltage: not cpu dependent leave on auto
PCIE SATA Voltage: not cpu dependent leave on auto

Once you have and stable configuration, try to find yourself your optimal GTL values. It's easy, move it slowly up and down until you get an error in a fixed time (aprox. 5min), and then set your GTL with the mean between errors...

Regards.