Working on a very large route......81,000KB. Was running route when wife needed me. GPU temp was 60-61*C. Paused session. Was away from computer for about 15 minutes and when I came back, GPU was at 72*. Unpaused it and immediately the temps started coming back down. 30 seconds later, back to 60* Stayed there. After awhile, I needed to edit a few things like trees blocking rails, etc. Again, temps started to rise while editing! Got up to 72*. Back to driving, temps go back to 60. Why?