Don't always trust what speedfan tells you
![;)](images/smilies/msn_wink.gif)
On my PC it tells me temp2 is 127C, which is complete and utter bullshit
![;)](images/smilies/msn_wink.gif)
I doubt your PC would survice at 114C
Anyway, about the case, trust me it's safe to turn on a PC without the case on. as long as you don't start poking in it with your fingers, that is
![;)](images/smilies/msn_wink.gif)
The case is just to protect against things touching important parts and stuff, and it's better for the airflow. but a PC can run fine without a case