Tahoe Installation on B850

[Koffein71]

Hi Forum,

my old Haswell Hackintosh got broke before christmas and now i've got a new PC with this items:

CPU: Ryzen 9800X3D
MB: MSI MAG B850 TOMAHAWK MAX WIFI
RAM: Kingston FURY DIMM 64 GB DDR5-6000 (2x 32 GB)
SSD: 2x WD Black SN8100 4TB (PCI-E 5.0) (1xWin11 1xLinux)
1x WD Black SN850 2TB (PCI-E 4.0) free for macOS
1x Crucial MX500 2TB (SATA3) with a macOS Tahoe installed on my old broke Hackintosh
GPU: Radeon 6800
Internal LAN will not be used, because it would not supported by macOS. Instead i will use USB2LAN adapter.

My goal is to boot the Tahoe installation on the SATA SSD and then to clone it to the 2TB nvme.

I've tried to create an EFI with OpCore Simplify but the attempt failed as espected.
Further trials with Dortania Guide and a lot of forum readings failed too.
I use OpenCore 1.0.6-DEBUG and most kexts are debug version too.
AMD patches (beta) has been applied and ACPI files has been mostly generated by SSDTTime.

Most attemps end with this log line:

AAPL: #[EB|LOG:EXITBS:START]

I am not sure about the root cause, found nothing about B850 builds, so maybe there is a specific problem with this chipset.
Has someone of you experience with AM5 B850 boards ? Are there any obstacles i am not aware of ?
As attachment my EFI folder and the logfile of last boot attempt.
Perhaps someone can provide some clues?

 

[alliance]

Sorry I can't help, but may I ask, with all of those drives, has that limited your PCI-E 5.0 speed to 4.0, as usually it does on non X870 platforms?
I'm getting a B850M soon, also an MSI, and was wondering what to expect if I ran multiple NVME/SATA's.

 

[Koffein71]

Can't say that, mostly i do not have both PCI-E 5.0 in operation at the same time. One has the Windows installation, the other one the Linux OS.
Both drives reaches nearly 15GB/s which is the maximum PCI-E 5.0 can provide. And according to the MSI manual both M2 slots are assigned directly to the CPU.
So my expectation is, that the CPU can handle both at that speed.

 

[Edhawk]

No, as only one or at best two of the NVME drives is capable of running at PCIe 5.0 (usually the top M.2 connector). The rest are either set to work at PCIe 4.0 or 3.0 speeds.

I doubt you will notice the difference between a drive working at 5.0 and 4.0 speeds. I can’t on my x670E or B650E boards. Benchmarking will show a difference but real life usage I am not so sure.

You do need to check if any of the NVME connectors share bandwidth/PCIe lanes with the SATA ports, as that used to be a limiter for one of the M.2 connectors on some boards. The user manual or specification page usually states if that is the case, or not.

 

[Koffein71]

According to the MSI manual both M2_1 and M2_2 slots are PCI-E 5.0, assigned directly to the CPU. M2_4 is PCI-E 4.0 from chipset and M2_3 is PCI-E 4.0 x2 shared with a PCI slot.
M2_4 got a WD Black SN850 (PCI-E 4.0). I want to clone the Tahoe installation from SATA SSD.
But first i have to make a proper EFI for the B850 board. Thats the point i currently working on.