You probably wanna leave those settings as they are because the timings are also decreased in the system default settings for ram. So turning the frequency to 1600MHz and increasing the timings will actually won't speed up your system too much the speed boost is very little.
Either way if you still wanna change it
Open bios DEL key(most probably) during the post
Open MB Intelligent Tweaker
System Memory Multiplier
Set the multiplier to 12.
In DRAM Timing Schedule chane the timings to the timings specified on your ram card.
I think the timings are 9-9-9-24.
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