High Sierra 10.13 GA-Z270X-UD5 Issues

[iJamesGC]

Hello, I have a few unresolved issues. The more annoying is the audio hiss. The audio hiss remains despite many attempts to resolve. I have read and followed several guides regarding the audio. The hiss remains.
Another issue is the yellow and grey boxes at boot. Also at boot after AMI logo appears, the text gets scrambled as shown in attached image 3760. Attached image 3761 shows the yellow / grey boxes during the Clover portion of the boot up. Gone are the original icons.
The system includes:
Gigabyte GA-Z270X-UD5
Intel i5-7600K
Asus STRX GTX970 4GB
64GB Kensington RAM 4x16GB
LG BD/HD-DVD blu-ray burner (internal) (HL-DT-ST BDDVDRW GGC-H20L)
4TB Seagate for data
480GB SSD for future testing
256GB SSD PCIE boot drive WD-Black

 

[ChrisRobmacbuntu]

You can try downloading an older version of Clover and applying that. That's what I did but I was also doing a fresh install. I hated the white/grey/green gui.