Can't find a way to boot from usb for clean Catalina Installation. Help Needed.

Hello everyone,

I got a working system with High Sierra with these specs:

Gigabyte GA-Z97-HD3
i7-4790K
GT 740
16 gb ram
500 gb ssd
3x 1TB WD HDD

I wanted to make a clean Catalina install with a brand new SSD. I made an installer usb stick. Unplugged my High Sierra SSD and 3 X 1TB HDD's. And plugged my new SSD to the system and restart to install and after boot F12, I had the boot options menu but none of it worked. Whatever I choose It keeps send me to realtek PCI GBI family.... I...

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