Hi! I'm having trouble getting 3,95 Ghz or even 3,9 Ghz with Q9450.

Here are my specs:

Q9450
Striker II Extreme bios 0704
9800 GTX
2x2gb 1600 Mhz
Vista 64bit

I tried 3,9 with these settings but my computer wouldn't start:

Vcore 1,6 V
VTT 1,62 V
PLL 1,5 V
NB 1,7 V
SB 1,7 V
Memory 2,0 V

Could someone help me with this? Soon I'm going to get water so I can raise the voltage even further but I wonder why Vista won't start with those voltages and FSB?