A week ago I purchased a 17inch macbook pro. The machine has run great since and the temps have even seemed a bit cool. For some reason today after running the machine with an external monitor up the temperature was up to 78 C. I haven't been doing anything really intense on the machine so I'm wondering if this is normal or not. Upon booting up the temps are around 35C after a while it idles around 50C then sometimes after having the machine on for a while it hits the upper 60s and 70s. It almost seems as though the machine is too quiet. If i put my ear close enough I can hear the fan but it almost seems like it's not on high enough. I have the latest firmware installed. Are these temperature irregularities normal? Are there any programs out there that can be used to control the fans or is this just normal behavior of a mbp.