HP Z840 - Dual Xeon E5-2698 v3 - CPU Power management issue....

Q: What is a Hackintosh?

A non-Apple computer configured to run macOS using compatible PC hardware combined with a custom bootloader and configuration files to emulate a real Mac environment.

Q: Is building a Hackintosh legal?

Installing macOS on non-Apple hardware violates Apple’s End User License Agreement (EULA). It is generally not illegal for personal experimentation but not permitted for commercial use.

Q: What hardware is best for a Hackintosh?

The best hardware closely matches real Apple systems, with Intel CPUs (6th Gen to Core Ultra), AMD Radeon GPUs, compatible chipsets, and Intel-based Wi-Fi cards offering higher success rates.

Q: Can I build a Hackintosh with an AMD CPU?

Yes, macOS can run on AMD Ryzen CPUs using kernel patches, but Intel CPUs provide better native compatibility.

Q: What is OpenCore?

OpenCore is a modern Hackintosh bootloader that provides near-native macOS behavior and is the recommended bootloader for new installations.

Q: Is Clover still supported?

Yes, Clover is still supported but less recommended compared to OpenCore for modern systems.

Q: Which macOS versions support Hackintosh?

Hackintosh systems support macOS versions from Leopard up to recent releases, depending on hardware compatibility.

Q: Do NVIDIA graphics cards work on Hackintosh?

Only older NVIDIA GPUs work on older macOS versions; modern NVIDIA GPUs are incompatible with current macOS releases due to lack of driver support.

Q: What is an EFI folder?

The EFI folder contains the bootloader, drivers, kexts, and configuration files required to boot macOS on a Hackintosh.

Q: What are kexts?

Kexts (kernel extensions) are drivers that enable hardware functionality such as audio, Ethernet, USB, and graphics.

SpacemanSpiff · June 4, 2021

Hi there !

This new setup is giving me a hard time around CPU power management and therefore I have sub-optimal performances.

I had to manually finish the sdl out of ssdtprgen because it would fail compiling for more than 16 cores... (see sdl attached)

I read that CPUPM aml were broken for X99 so I used CPUFriend kext to "load" it.

At boot I run into "There are 0 entries in the linked list before target" and X86PlatformShim::start - Failed to send stepper.
Checking ioregistry X87PlatformSHim is attached, AppleACPICPU attached to all core and showing ct-frequency-data...

sysctl -n machdep.xcpm.mode is "1" but vector_loaded_count is 0...

I'm out of ideas end spent way too much time on this, so I came here seeking help !

(I installed using opencore guide for Haswell-e and their premade SSDTs. It booted in a couple of hours but I've been trying to solve XCPM for 2 weeks !!
Still using the default dsts except that I modified SSDT-PLUG for dual cpu. (Not sure it was needed though)

I hope we can fix it !
Thanks in advance,

Send me Xaviers-iMac-Pro.zip 2CPUs_64cores_CPUFriend.dsl SSDT-PLUG-XRR.aml

MaLd0n · June 4, 2021

1- from OpenCore manual

Note 3: For XCPM support it is recommended to use the following combinations.

Haswell-E (0x0306F2) to Haswell (0x0306C3):
Cpuid1Data: C3 06 03 00 00 00 00 00 00 00 00 00 00 00 00 00 Cpuid1Mask: FF FF FF FF 00 00 00 00 00 00 00 00 00 00 00 00

Broadwell-E (0x0406F1) to Broadwell (0x0306D4):
Cpuid1Data: D4 06 03 00 00 00 00 00 00 00 00 00 00 00 00 00 Cpuid1Mask: FF FF FF FF 00 00 00 00 00 00 00 00 00 00 00 00

2- OC have good quirks

AppleXcpmExtraMsrs
Description: Disables multiple MSR access critical for certain CPUs, which have no native XCPM support.

This is typically used in conjunction with the Emulate section on Haswell-E, Broadwell-E, Skylake-SP, and similar CPUs. More details on the XCPM patches are outlined in acidanthera/bugtracker#365.

AppleXcpmForceBoost

Description: Forces maximum performance in XCPM mode.

This patch writes 0xFF00 to MSR_IA32_PERF_CONTROL (0x199), effectively setting maximum multiplier for all the time.

Apply a fakecpuid for ur cpu and select these quirks. check result

Others things (if don't work with solution above)

have several Kernel patches for x99

need some some for check what best result

Quote

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This ssdt looks good SSDT.aml.zip but with x99 we stay need kernel patches

SpacemanSpiff · June 5, 2021

Thanks MaLd0n,

ForceBoost is working, but that's a bit "cheating" I can reach Max Turbo though! I guess it's not efficient while idle though.

I'll try the patches,
Do we know allready if the xcpm_core_scope_msrs patches you sent are working with Big Sure? Are they all for Haswell-e ?

Should I try them one by one or all at once ?
And in this case should I suppress CPUFriend and associated data while testing ?

Thanks again for your help,

** Update:
I picked iMac15,1 as an smbios because it was the recommanded haswell one. For some reason changing the smbios to MacPro7,1 (while using Cpuid) improved things : CPUs running coller and more steady, improved benchmark by a big margin... it also solved Netflix in safari not running issue.

Edited June 5, 2021 by xrr

MaLd0n · June 5, 2021

with quirks need test with any extra

x79 and x99 dont have a perfect pm. several things, apple changes after updates. only problems

MacPro7,1 is the best smbios for "new" hardwares

SpacemanSpiff · June 6, 2021

I don't know why it's better with the MacPro7,1 smbios for my Haswell-e but believe me it solved a lot of issue (DRMs, CPu runnning better and cooler). Maybe something related to Desktop vs iMac settings.. Not sure if it's the best though, I'll try others like iMacPro1,1 and MacPro6,1 just in case...

+12% single core and best multi-scores (by small margin)

Check the first 3 results (same settings just changing the smbios)

https://browser.geekbench.com/user/321358w

For now It might not be perfect PM but quite satisfactory...

Edited June 6, 2021 by SpacemanSpiff

MaLd0n · June 6, 2021

nice

very good result

https://browser.geekbench.com/v5/cpu/8273940

SpacemanSpiff · June 7, 2021

Yes, I guess about the best you can get with these CPUs without exploiting the "All core turbo boost unlock" Bug of E5s v3... (not possible on my Z840 as I can't get rid of the microcodes in Bios because it's a signed protected BIOS)

https://browser.geekbench.com/v5/cpu/search?utf8=✓&q=2698+V3&sort=multicore_score

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