When you open it up you will find apple in the titanium laptops have used the worlds smallest internal cooling fan (1cm x 1cm of actual fan blade airflow area). Also pointing in a wierd relation to the vent it sits next to , the thermal design on this laptop could not have been much worse from a design perspective, except say a bare chip ? I have replaced the thermal paste on mine neatly and precisely with top quality thermal paste it makes very little difference, as the poverty of design revolves around an inability to push the hot air out of the laptop, again another example of form over function, this laptops micro fan will kick in hard with no heavy load straight after boot up. The only way to correct excessive fan noise on the titanium models would be to completely re-design them. They are flawed by design.