Man, to be honest my mobo sensor usually hovers around 32 degrees when I've run orthos for a while, but after a few hours i guess it might get hotter, your problem probably is your actual NB temperature, not your MB temperature, in which case your NB is going to be MILES higher than 36 degrees. Nb even at stock was my problem because i took away its only cooling, the CPU fan. Once i put liquid on northbridge as well as CPU though, np problem, and i usually run my volts insanly high, hey leeghoofd :P