I'm a bit stumped on this one. I was trying to bring an old box back to life (Gigabyte GA-H55M-UD2H) which had been running 10.11 as the latest OS. It's back together with a mish-mash of parts and replacing my wife's seldom-used desktop (which was an old Core2Duo). I figured this would be easy since I know it's hackintosh-able. I downloaded the latest UniBeast, my copy of 10.12, and made my boot media on a well-tested SanDisk key that I was just using for some Acronis testing. It boots fine on my current hardware. It does boot on the old box, but everything is in slow motion. From "Loading OS..." to a black screen with some text in the center with the version of Clover stated (4047?) is about 5 minutes. From there to the screen where you can select which drive to boot off of, that's about 15 minutes. Booting off the USB is about 15 minutes. This is making any actual troubleshooting quite difficult. I've tried the front USB ports as well as the rear (onboard), no difference. What can I look at here? What settings other than legacy (which I'm using) vs. EFI could have an effect on Clover so early in the boot process?