ASUS Striker II Extreme

[Justifire]

I have a QX9770 which I can just get to 4.5Ghz stable...

My rig is as follows;

Striker 2 Extreme, watercooled Northy
QX9770 watercooled
3 x GTX 280's watercooled on a seperate loop
Lian-Li 343b cube
Corsair dominator DDR3 1800Mhz stock timed at 8-8-8-20
SSD hard drive
X-fi sound card
24" screen

How do you get your CPU over 4.5GHZ? are you using liquid nitrogen? if now I would appreciate any comments on how to push past the 4.5Ghz barrier I'm currently at!

Thanks in advance

As he noted, he's using LN2 (Liquid Nitrogen)
I get 4.5 ghz under chilled water with my qx9650