Care to share your experience with Z170X firmware trouble? I'd love to know what I'm in for...
Cannot tell too many interesting facts ... I had to remove one pair of memory modules and the graphics card to boot into the firmware screen, then did all the known corrections there (including setting memory to XMP profile), then had to figure out how to correct the old Sierra config.plist settings within the Clover boot menu, as High Sierra boot got stuck every time ... I needed at least 20 reboots to get to a successful boot, then finally arrived in macOS, changed all the relevant settings in config.plist, and had many more reboots to refine it. Strangely the USB works fine with the old uia-exclude-setting, whereas none of the newer methods worked.
I don't like that childish looking "racing" interface of the new Gigabyte firmware, but still I would recommend it highly:
1. There are no excessive boot entries anymore.
2. On F5 I couldn't get my 6700K below 1100 MHz idle – on F22a it's 800 MHz. (Could be due to OC before, though.)
On High Sierra I removed all the rubbish, as I do always:
iTunes, iBooks, Photos, Maps, Messages, Notes, Reminders, Stickies, Time Machine.
And – as I am radically boycotting anything from Microslut and Oracle: I removed every file containing "Microsoft", "Oracle" and "Java" (not Javascript!), mainly located in various /Library or /System/Library folders, as I have to do after every update or upgrade, and also from some applications, namely LibreOffice, within their packages.
Now I feel "clean" again.
Though, I still haven't found a way to replace the disgusting Microslut FAT format of the EFI partition – any ideas about that?!?