Guys, Nothing to worry about, RAM is running at 1600. You need to remember DDR is double data rate, so 800(frequency)multiplied by two equals the data rate which is 1600.
Also, to confirm your RAM type whether it DDR2 or DDR3, go to task manager and click on the performance tab where you need to select Memory. Check the right side top corner, there it is clearly visible 4.0 GB DDR3.
You can also install 3rd party software like CPU-Z to validate the RAM type.
P.S - Product is great at this price point.