pentium D will run very hot, better get a good cooler first.
and what psu are you using?

i suggest get a good cpu cooler before overclock.
and change psu. get a better psu to provide stable voltage and current when psu is on load.

about cpu cooler, the cooler master hyper 212+ should be good.

about psu, you can consider the used cooler master real power pro 550w here, its cheap.
http://forum.lowyat.net/topic/1450284

about the casing, if you don't want to change, you have to modify abit,
since old skol casing has bad air flow.
so you find the way to let it has good air flow.

This post has been edited by saturn85: Aug 5 2010, 04:10 PM

if you have higher budget, you can always go for better stuffs.

actually my suggestion is for reference only.
in the same budget, still can get other stuffs.

haha, you can try, make sure it is stable overclock and temperature don't exceed the limit.
but old motherboard usually don't have heatsink on the mosfet of the voltage regulator circuit,
so it is not meant for overclock.
and cap ayam psu have higher noise, don't know will cause stability issue or not when overclock.

you can refer here:
http://www.hardwaresecrets.com/article/Eve...tor-Circuit/616