latitude e6520

I have a Dell Latitude E6520 with 8GB of 1333MHz DDR3 RAM and I want to put in 16GB of RAM in it. I recently upgraded my CPU from a i7 2640M to an i7 2760QM and while both do support 16GB of RAM, the i7 2760QM supports it at a higher clock of 1600MHz. So my first question is if my CPU supports...