Are you still a bit new to all this, friend?
At the main menu of your motherboard's BIOS, go to the MB Intelligent Tweaker (M.I.T.)
Change Set Memory Clock
Change Memory Clock
This will put your RAM @ 1600Mhz in you're still at stock CPU Frequency
You will have to watch the resulting frequencies of the CPU Frequency
times the ratio of the different devices as you change the CPU Frequency
in attempt to overclock your processor. Use their ratios to keep others (i.e. HT Link) at the same speed the start at.
You may have to set your timings manually to what the RAM is rated for.
You can do that in the DRAM Configuration
The first four numbers under SPD
should be what you're after (i.e. starting from the top, 9-9-9-24).
For voltage control, you'll have to change the System Voltage Control
You can then access the DRAM Voltage Control
option, and set it to the RAM's rated voltage.
The wrong setting can easily damage your hardware,
especially with voltages, but also possible otherwise.
Proceed with caution, and at your own risk.
Always watch your temps, pace yourself and stress test.