Why won't my overclock work?

[Elskie87]

Hi,

Despite reading numerous threads about overclocking my PC I’m no closer to being able to get a stable overclock.

I can boot into windows fine, when I come to turning my pc on in the morning it will go into a reboot cycle and then turn on with the overclock disabled.

What am I doing wrong?

Here’s my specs:

Q6600 Go
Giga byte P35 DS4 (F11)
OCZ 2 x 1 gig 8500 reaper
Raid 0
Hyper Type R 580W
7800GT
XFI Elite Pro
Vista Ultimate

And my Bios setting:

 

[Elskie87]

Forgot to mention that sometimes even with the overclock disabled it will go into a reboot cycle. do i have a faulty mobo?