This little dough does not look, but without it your PC may not function properly. Placed directly on the CPU of the computer and in the cooler. This paste is responsible for conducting heat better than does direct contact with the fan. We need to know that we must change this paste every 2 to 4 years on your computer to protect it from overheating (and therefore his death) ... This is a fairly simple operation but requires to respect certain rules, so go through someone who already knows what if you are a novice in this field; and look on youtube if you are handy :)