QUOTE(Patent @ Dec 18 2012, 12:54 PM)
How to know that heatsink actually make proper contact with the cpu?
I tried touching the base plate after shutting down the computer but I didn't feel any heat. Does the heat lost very quickly?

To check for proper heatsink contact, check how thermal paste coverage when you pressed the heatsink against the CPU.
Your heatsink is using HDT (heatpipe direct touch), use
this to properly apply thermal paste on it.
QUOTE(sulfuriq @ Dec 18 2012, 02:01 PM)
General Rule
More surface on the Heat-sink, the more the heat can be disperse quickly
The larger the diameter of the fan, the more surface area it can cover
The higher the static pressure fan rating, the more air can be pushed within the heat-sink fin.
For heat-sink fan always go with the higher static pressure
Don't be ridiculous. CM Hyper TX3 Evo could only fit 92mm fan. When fitted with 120mm fan it will be bigger than the heatsink itself, thus less airflow going though heatsink itself and the motor of the fan is larger than the 92mm fan means more dead spot (no airflow) on the fins. I have 92mm heatsink before (Arctic Freezer 64 Pro), fitting 120mm fan isn't the solution to get better performance out of it. Only way is to get higher CFM 92mm fan.