Heat Sink

Is the pre-applied thermal paste on heat sink enough?
I have an AMD Phenom II Black Edition Quad-Core processor that’s heat sink has pre-applied thermal paste on it. Is this enough or do I need to remove it and buy another thermal paste?
As long as it is the Silver stuff. The manufacturer is gonna put as much as should be on there. They don’t want your stuff overheating.
How to put a CPU heat sink on the motherboard