my 733 never get's over 40 C full load.. so I would say from what I've seen that 40-50C is good for full load. Even though it's spec'd at max 80 C if it's running that hot something is not right.
You are about to answer a thread that has been inactive for more than 6 months. If you still wish to proceed, please ensure that your posting is original and does not duplicate or overlap any prior responses to this thread.