P5k won't OC

[razorwindmo46]

Ok People,
I need a bit of help. I can't overclock my system. I can change settings and even let the mobo do the OC'ing but makes me revert to standard settings only. Is there a jumper on the mobo I missed preventing me from making any changes?
I have read many forums on OC'ing and tried ALL the different settings and it's a no go on anything I try.
This is what I am trying to do;
http://www.tomshardware.com/2006/05/10/dual_41_ghz_cores/page6.html

Asus P5K bios 0704
Pentium D 805 Smithfield rev BO
2048 Corsair memory
120gb HDD

 

[razorwindmo46]

I have found out why I can't OC. This board doesn't support the 805 D