SpacemanSpiff

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

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...

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.

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