Arctic Silver thermal compound is a polysynthetic material that can help lower your CPU and core temperatures. Professional computer technicians employ Arctic Silver thermal compound to prevent wear and tear as well as overheating. Especially if you are constructing a souped up version of an already loaded computer, you need a good coolant to prevent thermal problems from ruining your applications.
According to heat conduction experts, you might not see results immediately following an application of Arctic Silver thermal compound. However, many smart reviewers beg to differ. They claim that they have seen substantial heat reduction immediately. That being said, the "temperature drop" figures will certainly vary depending on what components you use to build and maintain your CPU.
Arctic Silver thermal protection does have its limits. Over the long term, natural wear and care and compound erosion may remove protective layers. If this happens, you can easily reapply a layer or two as a quick fix. Just make sure to clean your core and heat sink with alcohol--you don't want random particulate matter getting into the core of your CPU unit.
To learn more about how to care for your computer, check out professional feedback and detailed spec descriptions here at Newegg. You can find parts here to solve most primary care questions as well as many sophisticated problems. Just because you load up your CPU doesn't mean you have to suffer through vexing mechanical issues.