How to overclock intel Pentium 4 HT ?


Blagh just get the Q9400 😛. Is it an OEM computer, if it is chances are you cannot OC.
 
what motherboard do you have? if its an intel or oem board you wont have much luck.

if its a gigabyte/asus/ect ect you might get 10-15% without too much trouble
 
And if you're using the motherboard you bought at the same time as that chip, make sure it'll actually support a Q9400, there is more to it than just the socket (power, bus frequency, multi-core support etc)