Well, I dont know much about the 3300's, or that they even made them. But it probably just depends on what type of core and other variables, like all other CPU's.
I have my Venice 3200+ at 2.4 with 1.525 vcore...makes me want to OC more.
I have the stock cooler and my idle temps are between 28-30 degrees....about 44 full load.