Belissimo !!

bravo, bravo !!
But check your RAM speed too. Anyway, great news.
Can you check somehow if your CPU actually WORKS at the correct speed?
There are many known cases where the About My Mac does not read correct, but the machine works correct. There are also tool to modify directly about my mac.
heheh... you can make it read quad core extreme and stun your friends! hehe I think maybe OSXtools does this
Also, for the sake of stability, try removing smbios number 2 and reboot (dont forget to repair permissions) - check if it reads coorect, then the opposite.
There is no need for these 2 kexts, it could be both are conflicting. I dont have mine here right now, but sure as heck I will remove one too!
Also, thanks for the kudos, but I assure you I did not do anything special other than read kilometers of threads and edit plist. No programming or hacking here - so I guess its the dsdt.aml actually doing something...
Right.. but you dont use dsdt with ideneb...hmmm ...
DSDT is really really confusing. I undesrtand what it is, but I dont understand who needs it and who doesnt. I seem to not need it.