I have the N5010. I  updated my drivers to the latest available on the dell support/drivers page, but the latest driver for HD 550v is dated june 2010.
All the games I play keep telling me the graphics driver is out of date.
I have searched for one newer but cannot find one.
I have tried AMD Driver auto detect and it has said to install  "mobility Radeon 4xxx series" I am guessing it is thinking I have the HD4650 as that is the chip the 550v is based on. 
What I want to know is if I install this driver instead is it ok? Will is work ok or will it damage anything?
Or is there a later 550v driver i am just not seeing?