I've been using speedfan to monitor my exhaust fans and temperature. I've been wondering if 300-400 rpm is a normal fan speed to cool a case. This fan also has a problem of starting.
I've also wondering if it’s safe for a CPU (CPU in question) to jump from 120F (49C) to 155F (68C) and stay there for hours. It usually jumps when I run a game, but recently I've seen it at that high temperature just when I had firefox open.
Are these safe numbers for a computer to run on?