yep probably so.
i would download coretemp and watch it though. check it like when you are playing a game.
since you only have one intake (door), investigate and see if you can fit a larger fan, and that may require some modification. 120mm will move twice as much air + as 80mm.
here's an example:
on my 4200 i have one 120mm intake, one 120mm rear discharge, one 92mm intake in the door, a pci slot fan that i use if i game for a long time, and a psu that moves A LOT of air out of it's chassis.
you can never have too many fans. unless you're like a noise freak and cant stand it. but they make quiet fans. and wooo weeee you can always unplug em.
"nagasama no longer drinks tecate, or streaks out of the night for anything, and he has a fine wife so he has no use for your girlfriend...she is safe..."