It may not be listed but if you do a little resarch you will find many people with that motherboard have done so, if your not sure you want to try it then.
Not all LGA 775 motherboards will handle Q9XXX chips what is the make and Model of your motherboard? Q6600's are cheap and common on Ebay they normally overclock fairly well provided you have that capability.
It may not be listed but if you do a little resarch you will find many people with that motherboard have done so, if your not sure you want to try it then.