The E0 Q9550 SLB9V thread (finally!)

[les_paulde]

CPU Voltage: 1.45 LLC disabled 1.347-6 @load (as 1.45 LLC disabled should give you similar load voltage)
CPU GTL Voltage Reference (0/2): 670
CPU GTL Voltage Reference (1/3): 630
CPU PLL Voltage: 1.62
FSB Termination Voltage: try up to 1.4v
DRAM Voltage: 2.16
NB Voltage: 1.38 try to keep .02v below VTT

try suggestions in bold, they're working great for me.