Oh, boy! Both are same
Note that since Big Sur 11.3 and later, USB mapping is required otherwise you'll loose the USB function completely.
Oh, this is normal case with some of the new Intel 2.5Gbit Ethernet port in 500 Series Motherboard. A quick workaround is to Renew the DHCP Lease and under Hardware Tab, set Configure to Manually, Speed to 1000baseT and Duplex to full duplex, flow control. The MTU will remain 1500.
There are few versions of Intel WiFi kext. Make sure you're using the right one. Also, ensure that WiFi and BT is not disabled from your BIOS.
Big Sur v11.2.3 and OC 6.8. Your configuration is the issue, not the OpenCore or the kexts. Consider attaching your PR files to check further.
I gave up on the AX200 and bought a Broadcom adapter for the plug'n'play approach.
As for the NIC, you were exactly correct. The trick is choosing
Manual and then picking one of the first two options (non-energy saver options) in the NIC's advanced settings panel (I found that in another site's threads as well as I troubleshot this to pieces). It took a long time to ferret this out because the FakePCIID route works all the way up to 11.5.1, however there is also a kernel patch route that works fine right up until 11.3 or 11.4, at which point there were divergent instructions on how to tweak things. At 11.5.1, I only had to add the boot argument
dk.e1000=0 (no DeviceProperties, etc.) and do the auto->manual trick, above.
I ultimately setup an 11.2.3 installation on a thumb drive to use for the USB mapping and then took the resulting kext to my "running" installation of 11.5.1. It resulted in 18 ports being defined which ...it at least boots but is of course in excess of the 15 allowed, which causes a couple ports to work only with >= 3.0 devices and others to work only with <= 2.0 devices. I haven't bothered troubleshooting the thunderbolt yet, but I did skim this site's posts about that.
One thing I haven't been able to get working is the wake from keyboard/mouse (USB) by adding
acpi-wake-type under DeviceProperties. I found the root device to be
PciRoot(0x0)/Pci(0x14,0x0) however even with
DATA value
01, I still cannot wake the computer from my keyboard; I must press the power button. It makes me wonder if there's some BIOS setting I haven't managed to find yet. (This MSI BIOS is annoyingly organized, e.g., why is the VT-D feature over in the Overclocking section? Weird.)
Attached is my 11.5.1 OC 0.7.1 EFI in its current state. So currently I'm trying to decide out how to handle the excess USB personalities, Thunderbolt, and then disable all the debugging whatnot so that I have the more typical Mac startup. I've also had a strange issue where my UI suddenly glitched into squares of artifacts while a game was playing. I haven't figured out why that was; it has only happened once, but it required a reboot to fix it.
I took loads of notes, deltas against what your guide shows vs. the migration up to these versions and other debugging hints gleaned from various sites. If there's a way to suggest them as edits to the guide (pull request?), please let me know and I'll do it.