this motherboard?
https://www.asus.com/ca-en/Motherboards/Z97A/guide to overclocking on asus boards here.. further down the page is step by step procedure ( with images )
http://pcdiy.asus.com/2014/06/6-4970k-cpus-overclocked-oc-impressions-of-devils-canyon-on-asus-z97-motherboards/if you hit a beep code, and it wont boot.. the newer asus boards are generally good in the sense it will revert to the last good settings, (just power off for about 10 seconds and power right back on) ive found on mine that its only happened once out of 15 different throttle changes that it reverted right back to default settings..
** as a sidenote.. only change one perameter at a time when overclocking.. that way you know exactly where the error is; if there is to be one. change the stepping multiplier .5 at a time. and im sure there is also an application for windows that tests how far you can overclock within windows itself, before hangs/crashes/dumps/boot loops/or overheats...
... since you already have a liquid cooled setup, you SHOULD be okay to overclock at least .5-1 full ghz, all depends on how much strain you want to put on the motherboard socket (temperature on motherboard)
This post was edited by Canadian_Born on Jan 22 2016 01:13pm