There is no such thing as a life expectancy. Even if the product is discontinued from manufacturing it will work 100% fine. The life expectancy could probably be around 10 years? Depending on how you use it, what sort of applications you use, and how well you keep it. For example, my old Pentium 4 processor has been working perfectly fine in the last 8 years, because I have never overclocked it, etc, etc.