read more ...This method cost almost nothing and gives you an unbelievable results, if you are facing the heat problem and you are using a different motherboard you still can apply this method with taking in regard the differences between the heatsink style and design
Northbridge temps dropped 25 C and the CPU dropped 4 C
These temps drops helped me to overclock my Core i7 920 D0 to 4.2GHz on air easily
http://www.arabpcworld.com/forum/showthread.php?t=335