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FSB calculation still isn't working that's what's causing the error. @ssuper2k really appreciate the testing. Could you give this a go. I've altered the calculations and added some debug statements.

Big changes in the version above @ssuper2k if you could test that please, https://forum.amd-osx.com/threads/ryzen-9000.5375/page-3#post-36687

This build should have more success. Found some interesting notes in the Linux source,

Hopefully this build shines some more light. I've documented what's been changed here, https://discord.com/channels/249992304503291905/1027560607030984766/1282684907373727754 If it reports correct frequencies but still doesn't boot I'll add some debug statements to help diagnose why.

Yeah I saw that. It's because it wasn't able to grab them from the MSR. Latest test build hopefully fixes this.

@leesurone That's a good point actually yeah. Unless of course it doesn't affect AM5 booting but we wouldn't know yet. If possible a downgraded BIOS to a working version would be ideal. Wish I had the hardware on hand to test :rolleyes:

@ssuper2k Test this please. You can disable SysReport now too.. Will speed up your boot a bit.

This has more debugging added to try identify where it's hanging...

Did it boot? I don't see the error anymore? FSBFrequency was 0, causing the DivU64x64Remainder error. I've set OC to apply a FSB of 100 if it detects 0 if (CpuInfo->FSBFrequency == 0) { DEBUG ((DEBUG_ERROR, "OCAK: FSBFrequency is 0, setting default value to 100MHz\n"))...

Ok please test this new revision and provide same log regardless of result,

We are testing them out. Check here, https://forum.amd-osx.com/threads/ryzen-9000.5375/page-2#post-36635

Anyone with a 9000 series tried this yet? https://forum.amd-osx.com/threads/ryzen-9000.5375/page-2#post-36635

I've added some debug statements here. Please enable logging to file Target = 67 and upload the file please.

I was right in my assumption. Upon checking the linux source Zen 5 is indeed 1Ah now, if (Cpu->Family == AMD_CPU_FAMILY) { Divisor = 0; CoreFrequencyID = 0; CoreDivisorID = 0; MaxBusRatio = 0; switch (Cpu->ExtFamily) { case AMD_CPU_EXT_FAMILY_17H...

@ssuper2k I believe that the CPU family has moved from 19h. 7000 series must have used 19h too or I'm just completely wrong. Please try this test build of OpenCore and report back.

Can you boot with a debug build of OC and enable SysReport. This can be found under Misc -> Debug in the config, Then zip and upload the generated folder in the EFI.

I'm unfamiliar with Intel but could it be a MMIO issue?

Can you test this please.

Should work OOB unless it's the XTXH then it just needs spoofed to a regular version, https://dortania.github.io/GPU-Buyers-Guide/modern-gpus/amd-gpu.html#navi-21-series Device Properties device-id = BF730000

Can you elaborate on how it's not working? Any errors or screenshots of it?