The Energy Saver PrefPane supports this.
But Apple charged this for Haswell platforms and applied a unified Energy Saver setup for Haswell-based Macs. Haswell platforms therefore require to modify the selected Mac model platform plist file to distinguish Display Sleep and Computer Sleep.
Still, you can fairly easily revert to the traditional PrefPane. I can't remember where I got the details from (possibly MacRumors) but I've described the necessary mod here for my Dell Latitude E6440:
This mod would apply to your Asus B85M-G if that's what your inquiry relates to. Do it according to your own selected SMBIOS/Mac model.Go to the full post