Can't boot with anything higher..

[miseryguts]

i7 920 2.66 (stock)

I can get to a stable 3.2GHz with the following settings:

Clock Ratio: 20x
Base Clock: 160
CPU Vcore: 1.26250v (stock)
but anything higher 21x or even +1 on the base clock results in a failure to boot.

I don't really understand any of the other settings, so have left them all at default, can anyone who has achieved anything higher than the above on this processor guide me through what exactly needs to be changed (and to what values) i don't have any aftermarket coolers etc installed.

Thanks.

 

[Ginger-Menace]

take a look at the overclocking stickies on the overclocking section, will help you

 

[miseryguts]

take a look at the overclocking stickies on the overclocking section, will help you

I already have & they are all a bit general, i was looking for some advice that was a bit more specific as i am quite new to the overclocking thing.