The max voltage you want for your ram is 1.65, any more then that can potentially damage you cpu (according to intel).
Your rams speed is calculated by the bclk x RAM multiplier (which will be 10), so if you increase the bclk to 160 then that'll give you the speed you want.
But this also increases your cpu's speed (bclk x CPU multi) so if you want to keep it at stock then you'll have to lower the multiplier.
But as you've got an ASUS you should be able to skip all of that, should be an option in the BIOS to automatically set everything to work with faster ram, read your manual to find it.
Edit: Forgot something else to warn you about, once you've done this it'll automatically disable turboboost.
The reason for this is that turboboost increases your cpu's multiplier on a single core so if it stayed enabled it could potentially increase your cpu's speed by a considerably larger amount then was originally intended (160 x 22 = 3.52ghz), which whilst not a huge overclock does mean that you'll have to keep an eye on temps + vcore. Turbo can be re-enabled in the BIOS if you wish to though.