[Solved] BIOS freeze after installing Clover (UEFI)

I started having a weird issue, my motherboard's (Gigabyte GA-Z77X-UP5-TH) BIOS is freezing on the logo (not Apple's logo, Gigabyte's logo) after installation of Clover in UEFI mode. I can't enter Clover or even BIOS!
Also it happens only when I install it on the SATA drive. When I plug off the SATA drive and boot from USB it's all good. Also after this I have like 50 weird boot entries in my BIOS that all say Clover... something. Even when I plug the drive off the boot entries remain, I can't delete them!

When there's no Clover on the SATA drive everything works. When I install Clover in Legacy mode it works but I have other kinds of problems (like AppleACPIPlatform kext freezing so I have to use kext from the previous version of macOS).

It's the same with El Capitan or macOS Sierra.

What can be wrong? Please help!
Thank you!

Thanks! I was able to resolve my problem by unplugging the SATA drive from SATA slot, reformatting it on another computer and then reinstalling Clover in Legacy mode. This way everything works fine.