Well I don't know anyone with a core i5, But i have a core i7 920 (D0) and it can do 3.8ghz with stock voltage, I would have to use alittle additional voltage if i wanted turbo boost on, for it to be stable.
Im pretty sure your core i5 will do 3.2ghz with turbo, if it won't do it with stock voltage then up the voltage alittle. No big deal.
Theres really nothing to worry about.
nah .. i meant did any1 do OC with turbo boost on ?