Make sure you've set (BIOS) System Agent > Configuration >DVMT Pre Allocate = 64MB, default is set at 32MB which will cause a kernel panic as seen in your photo.I followed the guide and installed Sierra. I can boot using the USB EFI fine but when I try to boot from the EFI on the hard drive the boot fails and restarts. Here's a picture
From where did you download El Capitan? Sierra?I had the 530 selected and installed from MultiBeast.
I wiped the drive and started over and got the same results.
I wiped the drive again and installed El Capitan without a problem (except funky graphic effects, but at least it would load from the EFI on the hard drive).
Make sure you've set (BIOS) System Agent > Configuration >DVMT Pre Allocate = 64MB, default is set at 32MB which will cause a kernel panic as seen in your photo.
From where did you download El Capitan? Sierra?
This didn't cause a kernel panic in earlier versions of macOS Sierra, there were just horrific graphical glitches when set to 32MB. Glad you've installed ok.the BIOS DVMT change from 32 to 64