i believe q6600 is the most overclocable processor right now and i have been doing a research for doing an overclock . while doing that intel motherboards are most stable motherboar but they dont let you overclock your processor from your bios . it was heart rendering seeing people overclocking it upto 4GHZ with gigabyte and nvidia motherboards. but i found a way out .. its called tape modding. just place a tiny electrical tape on a specific pin of the processor and thats it .. WoW .. Im so happy now .. 3 ghz x 4 = 12 ghz of raw processing power ... rendering has never been so fun for me ...
overclocking has naturally got some risks of overheating and causing damage but not like old days . processors of today got better thermal sensors and shuts down automatically in case of anything goes wrong . yet u have to try it on your own risk . i got help from http://www.ocforums.com
no better way to make your investment work for you to the fullest and beyond.. and yah .. im not preeching overclocking here , just sahring my experience...