you shouldnt need to adjust clock skew etc to be able to run at stock speed...
i dont want you to get any more frustrated or annoyed... just send it back and have them check it for you.
if the kit is fine they wil send it back riht away, and if its broken they will replace it for you.
your from italy right? just contact gennaro and im sure you dont even need to send it to germany for an rma, he can probably check the kit for you in italy and maybe he can give you some tips to get it stable. i still dont think there is anything wrong with the kit... it must be a bios or bios configuration thing...

