You should not be worried. The spike is due to neither an improper seating of your CPU nor using too much TIM. Rather, the sharp rise represents the 'reaction' time of the cooling system, IMHO.
A CPU is an electronic device that can go to full load 'instantaneously' when it is stressed by a software. A typical cooling system simply cannot respond fast enough to such a high rate of thermal output.
A heatsink-fan system dissipates the heat from the cores -->IHS -->thermal paste-->heatsink base-->heatpipes-->fins-->air/fan. This thermal path takes a few seconds.
See the graph below. It shows a cooling system based on a temperature-controlled water chiller cooling an i7:-
There is sharp spike of about 17C within a few seconds when the CPU is full loaded. Rate of thermal output from CPU just overwhelms the rate of dissipation of the cooling system.
Then, for the next minute of full load, temp rises about 8C. Temp continues to rise because there is still a thermal inequilibrium But it is not rising as fast as before because the cooling system has passed the initial reaction time and is kicking in to dissipate the heat at a faster rate. Rate of thermal output is constant from the CPU. The rate of dissipation is picking up. Ultimately, given enough time, the curve would level off when the rate of thermal output equals the rate of dissipation. But, of course, this is not shown in the graph.
When the software stops full-loading the CPU at t = 2 minute mark, a sharp drop of about 17C occurs. This happens within a few seconds as well. Basically, t1 = t2 = reaction time of the cooling system.
Within the next minute, it drops about 7C and fairly much returns to the prior temperature of 42C.
I hope this gives you some peace so that you can concentrate your mind on your school work.Edited by windfire - 5/13/11 at 12:36am