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#31
It looks like your RAM supports XMP profiles, I'm hitting a bit of a snag on your motherboard though. The ASUS page for your motherboard suggests it supports XMP:
However, having read through the manual I can't find anything pertaining to XMP profiles. It suggests you have to manually set your RAM timings.
WarningIf you're not 100% certain of how to do this then leave things as they are.
Have a look through your BIOS Advanced Mode and see if you can find XMP profiles. If you do there should be two pre-loaded options of Disabled or Profile #1. Disabled will keep your RAM at the default 1333MHz, if you load Profile #1 that should set your RAM to 1600MHz. The screenshots below are from my BIOS and may not represent the layout/options you have in yours, they're there for reference only.
Once set, check your target timings for DRAM have changed accordingly.
If you can't find XMP within the BIOS then I wouldn't worry, you'll never notice any difference between 1333MHz or 1600MHz anyway, and even benchmark results can show only marginal increases in performance.