What is your RAM's default speed? If its default speed is 1600Mhz then it's just a simple adjustment in the motherboard's BIOS. It your RAM runs at a default speed of 1333Mhz you may need to increase the voltage on your ram to achieve your desired 1600MHz.
However Corsair makes really good RAM, even if its default speed is 1333MHz, I'd imagine you could ramp it up to 1600MHz with out adjusting the volts.