I am have a Dell Inspiron 3520 with a Intel Core i3-2730 CPU. CPU is rectangular in shape.
How should I apply thermal paste? I am already having Cooler Master Mastergel Pro. Can I use this thermal paste?
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The recommended approach is to remove the heatsink, clean up the existing gunk by using a cottonswab dipped in iso-propyl alcohol and place a small pea drop at the centre of the processor.
Once the heatsink is mounted, the pressure of the mount should spread it evenly across the processor.
This is how much I had applied for my i5-3470
Note that CoolerMaster recommends spreading the gel across the CPU evenly with the spreader but in my experience that causes more problems and it's easier to just put a drop and let the heatsink do the job.