- Joined
- Mar 18, 2017
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- Motherboard
- ASUS ROG Rampage VI Extreme
- CPU
- i9-7940X
- Graphics
- 2 X VEGA 56
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This thread is meant to be support/discussion for X299 motherboards :
it not only means ASUS X299 motherboards but also other brands such as GIGABYTE , ASROCK, EVGA, MSI (...)
The goal is to keep the support for these motherboards alive, publish updates, configurations, hardware, and so on.
It is the continuation of the previous threads.
All the support will be added and linked on my GitHub repo.
So today with macOS Big Sur we're going to start a new forward-looking experience :
macOS Big Sur :

Installation with Open Core OC 0.6.3
EFI OC 0.6.3 structure with the minimum SSDTs :
Users with bios V2002 or V3006 must respectively add :
SSDT-RTC0-RANGE-v2002 or SSDT-RTC0-RANGE-v3006 to boot.
Reminder Big Sur installation process post : #65
I will edit this first post with the return of experience and the new features macOS Big Sur :
For example :
- The root volume is now a cryptographically sealed apfs snapshot. Every single bit of the fsroot tree and file contents are verified when they are read from disk.
- It is no longer possible to boot a "live" filesystem, that is, one which can be written to.
- You can instead disable authentication of the root volume by booting to recovery and running `csrutil authenticated-root disable` in Terminal.
This thread is open to constructive discussions to keep our systems up to date.
It means that is a collaborative thread and each user is strongly invited to contribute and help.
All users are asked to give us their valuable feedback.
REMINDER ASUS X299 :
REMINDER ASROCK X299 CREATOR :
BIOS X299 Configuration :
Thunderbolt(TM) Configuration :
Motherboard Layout :
11.0.20A5343j macOS Big Sur Beta :
Features and Enhancements :
Experience
Updated menu bar
New icons for apps
Redesigned sheets
Full-height sidebars
Floating Dock
Lighter window appearance
Control Center
Control Center Designed just for Mac
Customize Control Center
Click for more options
Pin to menu bar
Notification Center
Updated Notification Center
Interactive notifications
Grouped notifications
Redesigned widgets
Customize widgets
Discover more third-party widgets
Safari
Customizable start page
Improved performance now it’s even faster.
Improved power efficiency
See more tabs at once
Website previews
Translation
Safari extensions on the App Store
WebExtensions API support
Grant extensions website access
Privacy Report : Privacy Report for each website
Start page Privacy Report
Password monitoring
Import passwords and settings from Chrome
Messages
Pin conversations, Multiple pinned conversations
Search
Share your name and photo
Group photos
Mentions
Inline replies
Message effects
Memoji editor
Memoji stickers
Enhanced photo picker
Maps
Guides
Create your own guides
Look Around
Cycling routes
Electric vehicle routing
Indoor maps
Live updates for shared ETA
New maps available in more countries
Congestion zones
Privacy
Privacy information on the App Store
Self-reported privacy practices
Displayed in a simple format
Software Updates
Faster updates software updates begin in the background and complete faster than before *
Signed system volume
macOS Big Sur introduces a cryptographically signed system volume that protects against malicious tampering. It also means that your Mac knows the exact layout of your system volume, allowing it to begin software updates in the background while you work.
APFS snapshot :
Fixing APFS Snapshot Procedure
Safari allows YouTube to watch videos in 2160p 4K resolution :
Support Loloflatsix on GitHub Loloflatsix GitHub ( this repo contains the file from closed @djlild7hina's repo )
it not only means ASUS X299 motherboards but also other brands such as GIGABYTE , ASROCK, EVGA, MSI (...)
The goal is to keep the support for these motherboards alive, publish updates, configurations, hardware, and so on.
It is the continuation of the previous threads.
All the support will be added and linked on my GitHub repo.
So today with macOS Big Sur we're going to start a new forward-looking experience :
macOS Big Sur :

Installation with Open Core OC 0.6.3
EFI OC 0.6.3 structure with the minimum SSDTs :
Users with bios V2002 or V3006 must respectively add :
SSDT-RTC0-RANGE-v2002 or SSDT-RTC0-RANGE-v3006 to boot.
Reminder Big Sur installation process post : #65
I will edit this first post with the return of experience and the new features macOS Big Sur :
For example :
- The root volume is now a cryptographically sealed apfs snapshot. Every single bit of the fsroot tree and file contents are verified when they are read from disk.
- It is no longer possible to boot a "live" filesystem, that is, one which can be written to.
- You can instead disable authentication of the root volume by booting to recovery and running `csrutil authenticated-root disable` in Terminal.
This thread is open to constructive discussions to keep our systems up to date.
It means that is a collaborative thread and each user is strongly invited to contribute and help.
All users are asked to give us their valuable feedback.

REMINDER ASUS X299 :
iMac Pro X299 - Live the Future now with macOS 10.14 Mojave ...
REMINDER ASROCK X299 CREATOR :
BIOS X299 Configuration :
1.) /AI Tweaker/
a.) ASUS MultiCore Enhancement: Auto
b.) AVX Instruction Core Ratio Negative Offset: "3"
c.) AVX-512 Instruction Core Ratio Negative Offset: "2"
d.) CPU Core Ratio: Sync All Cores
e.) CPU SVID Support: Enabled
f.) DRAM Frequency: e.g. DDR4-3200MHz
[ b.) and c.) must be set according to your CPU cooling : set to "0"will be preferable with air-cooling]
2.) /Advanced/CPU Configuration/
a.) Hyper Threading [ALL]: Enabled
b.) MSR Lock Control:Disabled
3.) /Advanced/CPU Configuration/CPU Power Management Configuration/
a.) Enhanced Intel Speed Step Technology (EIST):Enabled
b.) Autonomous Core C-States: Enabled
c.) Enhanced Halt State (C1E):Enabled
d.) CPU C6 report: Enabled
e.) Package C-State: C6(non retention) state
f.) Intel SpeedShift Technology:Enabled
g.) MFC Mode Override: OS Native
4.) /Advanced/Platform Misc Configuration/
a.) PCI Express Native Power Management: Disabled
b.) PCH DMI ASPM: Disabled
d.) ASPM: Disabled
e.) DMI Link ASPM Control: Disabled
f.) PEG - ASMP: Disabled
5.) /Advanced/System Agent Configuration/
a.) Intel VT for Directed I/O (VT-d): Disabled/Enabled
6.) /Boot/
a.) Fast Boot: Disabled
b.) Above 4G Decoding: On / Enabled
c.) Set your specific Boot Option Priorities
7.) /Boot/Boot Configuration
a.) Boot Logo Display: Auto
b.) Boot up NumLock State: Disabled
c.) Setup Mode: Advanced
8.) /Boot/Compatibility Support Module/
a.) Launch CSM: Disabled
9.) /Boot/Secure Boot/
a.) OS Type: Other OS
a.) ASUS MultiCore Enhancement: Auto
b.) AVX Instruction Core Ratio Negative Offset: "3"
c.) AVX-512 Instruction Core Ratio Negative Offset: "2"
d.) CPU Core Ratio: Sync All Cores
e.) CPU SVID Support: Enabled
f.) DRAM Frequency: e.g. DDR4-3200MHz
[ b.) and c.) must be set according to your CPU cooling : set to "0"will be preferable with air-cooling]
2.) /Advanced/CPU Configuration/
a.) Hyper Threading [ALL]: Enabled
b.) MSR Lock Control:Disabled
3.) /Advanced/CPU Configuration/CPU Power Management Configuration/
a.) Enhanced Intel Speed Step Technology (EIST):Enabled
b.) Autonomous Core C-States: Enabled
c.) Enhanced Halt State (C1E):Enabled
d.) CPU C6 report: Enabled
e.) Package C-State: C6(non retention) state
f.) Intel SpeedShift Technology:Enabled
g.) MFC Mode Override: OS Native
4.) /Advanced/Platform Misc Configuration/
a.) PCI Express Native Power Management: Disabled
b.) PCH DMI ASPM: Disabled
d.) ASPM: Disabled
e.) DMI Link ASPM Control: Disabled
f.) PEG - ASMP: Disabled
5.) /Advanced/System Agent Configuration/
a.) Intel VT for Directed I/O (VT-d): Disabled/Enabled
6.) /Boot/
a.) Fast Boot: Disabled
b.) Above 4G Decoding: On / Enabled
c.) Set your specific Boot Option Priorities
7.) /Boot/Boot Configuration
a.) Boot Logo Display: Auto
b.) Boot up NumLock State: Disabled
c.) Setup Mode: Advanced
8.) /Boot/Compatibility Support Module/
a.) Launch CSM: Disabled
9.) /Boot/Secure Boot/
a.) OS Type: Other OS
/M.I.T/Advanced Frequency Settings/
a.) Extreme Memory Profile: (X.M.P): Profile1
2.) /M.I.T/Advanced Frequency Settings/Advanced CPU Core Settings
a.) Active Cores Control: Auto
b.) Hyper-Threading Technology: Enabled
c.) Intel Turbo Boost Max Technology 3.0 : Enabled
d.) Intel Speed Shift Technology : Enabled
e.) Enhanced Multi-Core Performance: Enabled/Disabled
f.) CPU Enhanced Halt (C1E): Enabled
g.) C6/C7 State Support:Enabled
h.) Package C State limit:C6
i.) CPU EIST Function: Enabled
j.) Energy Efficient Turbo : Disabled
3.) /M.I.T/Advanced Memory Settings/
a.) Extreme Memory Profile (X.M.P):Profile1
4.) /BIOS/
a.) Boot Numlock State: Disabled/Enabled
b.) Security option: Setup
c.) Full Screen Logo Show: Enabled
d.) Fast Boot: Disabled
e.) CSM Support: Disabled
5.) /BIOS/Secure Boot/
a.) Secure Boot Enable: Disabled
6.) /Peripherals/USB Configuration/
a.) XHCI Hand-off: Enabled
7.) /Peripheral/Thunderbolt Configuration/
a.) Security Level : SL0 - No Security
8.) /Chipset/
a.) VT-d: Disabled/Enabled
9.) /Save& Exit/
a.) Save & Exit
a.) Extreme Memory Profile: (X.M.P): Profile1
2.) /M.I.T/Advanced Frequency Settings/Advanced CPU Core Settings
a.) Active Cores Control: Auto
b.) Hyper-Threading Technology: Enabled
c.) Intel Turbo Boost Max Technology 3.0 : Enabled
d.) Intel Speed Shift Technology : Enabled
e.) Enhanced Multi-Core Performance: Enabled/Disabled
f.) CPU Enhanced Halt (C1E): Enabled
g.) C6/C7 State Support:Enabled
h.) Package C State limit:C6
i.) CPU EIST Function: Enabled
j.) Energy Efficient Turbo : Disabled
3.) /M.I.T/Advanced Memory Settings/
a.) Extreme Memory Profile (X.M.P):Profile1
4.) /BIOS/
a.) Boot Numlock State: Disabled/Enabled
b.) Security option: Setup
c.) Full Screen Logo Show: Enabled
d.) Fast Boot: Disabled
e.) CSM Support: Disabled
5.) /BIOS/Secure Boot/
a.) Secure Boot Enable: Disabled
6.) /Peripherals/USB Configuration/
a.) XHCI Hand-off: Enabled
7.) /Peripheral/Thunderbolt Configuration/
a.) Security Level : SL0 - No Security
8.) /Chipset/
a.) VT-d: Disabled/Enabled
9.) /Save& Exit/
a.) Save & Exit
OC Tweaker :
CPU Configuration :
MultiCore Enhancement: Auto
CPU Ratio : Auto
AVX2 Negative Offset: "3"
AVX3 Negative Offset: "2"
CPU Mesh Max OC Ratio : Auto
CPU Mesh Min Ratio : Auto
Intel Turbo Boost Technology 3.0 : Enabled
Intel SpeedStep Technology : Enabled
Intel Speed Shift Technology : Enabled
Intel Turbo Boost Max Technology 3.0 : Enabled
DRAM Configuration :
Load XMP Seetting : XMP profile 1
Advanced :
CPU Configuration. :
Hyper-Threading Technology: Enabled
Active Cores Control: Auto
CPU Enhanced Halt (C1E): Enabled
C6/C7 State Support: Enabled
Processor Hot Mode: Disabled
CPU Thermal Throttling : Disable
Intel Virtualisation Technology: Disabled
Intel Safer Mode Extensions: Disabled
Hardware Prefetcher : Enabled
Adjacent Cache Line Prefetch : Enabled
Chipset Configuration
VT-d: Disabled/Enabled
Primary Graphics Adapter select : Auto/adjust if needed
Storage Configuration :
SATA Controller(s): Enabled
SATA Controller Speed : Auto
SATA Mode Selection : AHCI
SATA Agressive LPM : Disabled
Hard Disk Smart : Enabled
Third Party SATA3 Controller : Enabled
Third Party SATA3 Hot Plug : Disabled
Thunderbolt Configuration :
Intel Thunderbolt Technology : Enabled
Security Level : No Security
Thunderbolt USB Support : Enabled
Native OS Hot Plug : Native Mode
USB Configuration :
XHCI Hand Off: Enabled
UEFI Configuration :
UEFI Setup Style : Advance Mode
Active Page On Entry : Main
Full HD UEFI : Auto
BOOT :
ast Boot: Disabled
Boot From Onboard LAN : Disabled
Set Up Prompt Timeout : 3
Boot Numlock: Disabled/Enabled
Full Screen Logo: Enabled
Secure Boot: Disabled
CSM COMPATIBILITY Support Module : disable
CPU Configuration :
MultiCore Enhancement: Auto
CPU Ratio : Auto
AVX2 Negative Offset: "3"
AVX3 Negative Offset: "2"
CPU Mesh Max OC Ratio : Auto
CPU Mesh Min Ratio : Auto
Intel Turbo Boost Technology 3.0 : Enabled
Intel SpeedStep Technology : Enabled
Intel Speed Shift Technology : Enabled
Intel Turbo Boost Max Technology 3.0 : Enabled
DRAM Configuration :
Load XMP Seetting : XMP profile 1
Advanced :
CPU Configuration. :
Hyper-Threading Technology: Enabled
Active Cores Control: Auto
CPU Enhanced Halt (C1E): Enabled
C6/C7 State Support: Enabled
Processor Hot Mode: Disabled
CPU Thermal Throttling : Disable
Intel Virtualisation Technology: Disabled
Intel Safer Mode Extensions: Disabled
Hardware Prefetcher : Enabled
Adjacent Cache Line Prefetch : Enabled
Chipset Configuration
VT-d: Disabled/Enabled
Primary Graphics Adapter select : Auto/adjust if needed
Storage Configuration :
SATA Controller(s): Enabled
SATA Controller Speed : Auto
SATA Mode Selection : AHCI
SATA Agressive LPM : Disabled
Hard Disk Smart : Enabled
Third Party SATA3 Controller : Enabled
Third Party SATA3 Hot Plug : Disabled
Thunderbolt Configuration :
Intel Thunderbolt Technology : Enabled
Security Level : No Security
Thunderbolt USB Support : Enabled
Native OS Hot Plug : Native Mode
USB Configuration :
XHCI Hand Off: Enabled
UEFI Configuration :
UEFI Setup Style : Advance Mode
Active Page On Entry : Main
Full HD UEFI : Auto
BOOT :
ast Boot: Disabled
Boot From Onboard LAN : Disabled
Set Up Prompt Timeout : 3
Boot Numlock: Disabled/Enabled
Full Screen Logo: Enabled
Secure Boot: Disabled
CSM COMPATIBILITY Support Module : disable
EVGA BIOS Configuration
You must have Bios 1.23
OC
Notice : for non overclocking settings keep default parameters
Except :
PLLtrim Offset: "3"
HP PLLtrim Offset: "2"
MEMORY Configuration
Load XMP Seetting : XMP profile 1
Advanced
CPU Configuration
EIST : Enabled
Turbo Mode : Enabled
CPU Enhanced Halt (C1E): Enabled
C States : Enabled
Enhanced C1 State : Enabled
MSR Lock Control : Disabled
Hyper-Threading Technology: Enabled
Intel Virtualisation Technology: Disabled
CPU Tjmax: Auto
Active Cores Control: All
Intel Turbo Boost 3.0 Driver Support: Enabled
PCIe Configuration
Mandatory :
Above 4G Decoding : Enabled
Sata Configuration
SATA Mode Selection : AHCI
For each Sata device :
SATA Hot Plug : Disbled
USB Configuration :
No option for XHCI Hand Off but USB 3.0 speed is enbaled therefore equal to XHCI Hand Off enabled
Onboard Devices Configuration :
Keep all devices enabled but :
Wake of Lan : Disabled
BOOT :
Boot Numlock State : Disabled/Enabled
Boot Beep : Disabled/Enabled
Fast Boot: Disabled
Skip Home: Disabled
Always Show Boot Option : Enabled untill your configuration is working fine
Boot Mode Select : UEFI
Security: Disabled
CSM Configuration : disable
You must have Bios 1.23
OC
Notice : for non overclocking settings keep default parameters
Except :
PLLtrim Offset: "3"
HP PLLtrim Offset: "2"
MEMORY Configuration
Load XMP Seetting : XMP profile 1
Advanced
CPU Configuration
EIST : Enabled
Turbo Mode : Enabled
CPU Enhanced Halt (C1E): Enabled
C States : Enabled
Enhanced C1 State : Enabled
MSR Lock Control : Disabled
Hyper-Threading Technology: Enabled
Intel Virtualisation Technology: Disabled
CPU Tjmax: Auto
Active Cores Control: All
Intel Turbo Boost 3.0 Driver Support: Enabled
PCIe Configuration
Mandatory :
Above 4G Decoding : Enabled
Sata Configuration
SATA Mode Selection : AHCI
For each Sata device :
SATA Hot Plug : Disbled
USB Configuration :
No option for XHCI Hand Off but USB 3.0 speed is enbaled therefore equal to XHCI Hand Off enabled
Onboard Devices Configuration :
Keep all devices enabled but :
Wake of Lan : Disabled
BOOT :
Boot Numlock State : Disabled/Enabled
Boot Beep : Disabled/Enabled
Fast Boot: Disabled
Skip Home: Disabled
Always Show Boot Option : Enabled untill your configuration is working fine
Boot Mode Select : UEFI
Security: Disabled
CSM Configuration : disable
Thunderbolt(TM) Configuration :
TBT Root por Selector PCIE16_3 (Prime X299 Deluxe) / PCIE16_2 (WS X299 Sage 10G)
PICIE 16_2/3/4 Gigabyte WU8 / PICIE 16_4 Other Gigabyte
Thunderbolt USB Support Disabled
Thunderbolt Boot Support Disabled
Wake From Thunderbolt(TM Devices) Off
Thunderbolt(TM) PCIe Cache-line Size 128
GPIO3 Force Pwr On
Wait time in ms after applying Force Pwr 200
Skip PCI OptionRom Enabled
Security Level SL0-No Security
Reserve mem per phy slot 32
Reserve P mem per phy slot 32
Reserve IO per phy slot 20
Delay before SX Exit 300
GPIO Filter Enabled
Enable CLK REQ Disabled
Enable ASPM Disabled
Enable LTR Disabled
Extra Bus Reserved 65
Reserved Memory 386
Memory Alignment 26
Reserved PMemory 960
PMemory Alignment 28
Reserved I/O 0
Alpine Ridge XHCI WA Disabled
PICIE 16_2/3/4 Gigabyte WU8 / PICIE 16_4 Other Gigabyte
Thunderbolt USB Support Disabled
Thunderbolt Boot Support Disabled
Wake From Thunderbolt(TM Devices) Off
Thunderbolt(TM) PCIe Cache-line Size 128
GPIO3 Force Pwr On
Wait time in ms after applying Force Pwr 200
Skip PCI OptionRom Enabled
Security Level SL0-No Security
Reserve mem per phy slot 32
Reserve P mem per phy slot 32
Reserve IO per phy slot 20
Delay before SX Exit 300
GPIO Filter Enabled
Enable CLK REQ Disabled
Enable ASPM Disabled
Enable LTR Disabled
Extra Bus Reserved 65
Reserved Memory 386
Memory Alignment 26
Reserved PMemory 960
PMemory Alignment 28
Reserved I/O 0
Alpine Ridge XHCI WA Disabled
Motherboard Layout :
EVGA X299 FTW-K Motherboard Layout
11.0.20A5343j macOS Big Sur Beta :
Features and Enhancements :
Experience
Updated menu bar
New icons for apps
Redesigned sheets
Full-height sidebars
Floating Dock
Lighter window appearance
Control Center
Control Center Designed just for Mac
Customize Control Center
Click for more options
Pin to menu bar
Notification Center
Updated Notification Center
Interactive notifications
Grouped notifications
Redesigned widgets
Customize widgets
Discover more third-party widgets
Safari
Customizable start page
Improved performance now it’s even faster.
Improved power efficiency
See more tabs at once
Website previews
Translation
Safari extensions on the App Store
WebExtensions API support
Grant extensions website access
Privacy Report : Privacy Report for each website
Start page Privacy Report
Password monitoring
Import passwords and settings from Chrome
Messages
Pin conversations, Multiple pinned conversations
Search
Share your name and photo
Group photos
Mentions
Inline replies
Message effects
Memoji editor
Memoji stickers
Enhanced photo picker
Maps
Guides
Create your own guides
Look Around
Cycling routes
Electric vehicle routing
Indoor maps
Live updates for shared ETA
New maps available in more countries
Congestion zones
Privacy
Privacy information on the App Store
Self-reported privacy practices
Displayed in a simple format
Software Updates
Faster updates software updates begin in the background and complete faster than before *
Signed system volume
macOS Big Sur introduces a cryptographically signed system volume that protects against malicious tampering. It also means that your Mac knows the exact layout of your system volume, allowing it to begin software updates in the background while you work.
APFS snapshot :
Fixing APFS Snapshot Procedure
- Boot into the Big Sur installer USB
- Open a terminal, type `csrutil disable` and reboot
- When back into the installer, run `diskutil list` to find the location of the “Big Sur" disk, such as disk5s5
- Mount it using `diskutil mountDisk <disk identifier>` such as `diskutil mountDisk disk5s5` then run `mount -uw <volume mount point>` such as `mount -uw /Volumes/Macintosh\ HD/` to mount it as read write
- Run `/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs_systemsnapshot -v <volume mount point> -r ""`
- Then, to delete the snapshots on the disk, run `diskutil apfs listSnapshots <volume mount point>` and take note of each UUID of the snapshots
- Run `diskutil apfs deleteSnapshot <volume mount point> -uuid <uuid of snapshot>` for all snapshots on the disk.
- Verify that there are no more snapshots by running `diskutil apfs listSnapshots <volume mount point>` it should return "No Snapshots for disk"
- Reboot into the Big Sur desktop and make sure that running `sudo mount -uw /` returns no errors and that running `diskutil info /` returns a disk such as disk5s5 and not a snapshot such as disk5s5s1
Safari allows YouTube to watch videos in 2160p 4K resolution :
Support Loloflatsix on GitHub Loloflatsix GitHub ( this repo contains the file from closed @djlild7hina's repo )
Last edited: