Sorry, are you asking me what HS? Its my sisters pc, not a mates, so I'm not sure if you're asking me or Lunawolfy?
Its an Artic Cooling Freezer 7 pro v.2 and the case has one intake fan in the front, an intake fan on the side and an exhaust fan at the rear. I'll download Core Temp and have a look at that aswell.
I guess what I'm asking for really is what is the most comfortable limit in terms of heat I should be aiming to stay under. On AMD's site, the details for the 555 phenom II processor say 'Max Temp 70c' so I guess aslong as I keep under the mid 60's there shouldn't cause for concern.