i'll throw my $0.02, and take them with a grain of salt; those tests don't tell much, the real test is what you use the rig for. go for higher volts; i run 4770k @4.5 GHz and Vcore 1.5V, one week stable not yet trust it, tho.
i personally don't care for the RAM volts other than higher than 1.7 but my Asus takes care of that as well. Refer videos in youtube for OC, usually you don't need to touch those but...play as much as you want
Enjoy the toaster!