In BIOS, is VT-d enabled?
If so, please try disabling the DMAR changes we made in OC 0.7.2 as described in the post below. If you have more than 16GB, WiFi and Ethernet in macOS will stop working unless we also enable the Kernel Quirk “DisableIoMapper”.
I've recently upgraded to MacOS 11.5.1. Which was a breeze with OpenCore Configurator and HackinDROM! Everything is up-to-date (OC 0.7.1). Only the memory of the RX580 was always maxed out, even when doing nothing. I checked HackinDROM and there was an update voor OpenCore to 0.7.2. I ran the...
www.tonymacx86.com
Another option is to press
F12 at BIOS splash screen to open the BIOS boot menu, then select Windows directly. This bypasses OpenCore.