useable ram

Hello, I'm running windows 7 64bit with 16GB HyperX Fury 1333Mhz memory. I recently added a 16GB kit (2X8GB) to give me a total of 32GB RAM however this ram is rated at 1600Mhz and also from Kingston HyperX. I read most forums that the 1600Mhz RAM would down clock itself to 1333Mhz. In...