*** UPDATE: Hello there, after several tries finally i found a way to "sleep" x79 on High Sierra and even on Mojave. I used hibernation and seems to work well.
For anyone who wants to enable hibernation on high sierra / mojave must do the following steps:
1) open terminal and paste the following command "sudo pmset hibernationmode 25"
2) Update clover to latest version and enable the
HibernationFix and
RtcHibernateAware on Clover Configurator->Boot
3) Disable any nvram emulation such
emuvariableuefi-64.efi from Clover Configurator->Install Drivers
4) Reboot your hack and you are ready.
This is a temporary fix, still searching for a real fix.
P.S. Hibernation works because the content of your ram is dumped on your hdd/ssd and when system wakes the dumped content restored to your ram. As you can imagine this read/write process can limit your SSD life so be aware.
APFS FIX:
1) Enable StrictHibernate on Clover Configurator->Boot
2) Create Boot0082 key in nvram with value your APFS volume UUID
- Open terminal
- run command "diskutil apfs list" and copy your HighSierra Volume uuid
- run command "sudo nvram Boot0082=paste here your uuid"
3) Reboot your hack.
(uuid looks like XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX)