How to build your own iMac Pro [Successful Build/Extended Guide]

[hannibal1969]

I did not change any other values than the IDLE fan speed.. you are of course free to investigate additional parameter changes at your own risk and responsability..

I like you to know that currently I use the MSI airboost bios. I have to flash it to 200283 however I noticed that the MSI airboost bios delivers more information. I see now also RPM of the fan which was not visible with the original Sapphire Biosses if I'm correct.

ioreg -l |grep \"PerformanceStatistics\" | cut -d '{' -f 2 | tr '|' ',' | tr -d '}' | tr ',' '\n'|grep 'Temp\|Fan'
"Fan Speed(%)"=30
"Fan Speed(RPM)"=1506 <---(*)
"Temperature(C)"=27

(*) See 1500 RPM idle is definitely working with VGTab. So now its just a matter of finding the optimal settings

PS. 1500RPM @idle is quite loud ....
PS2. Encoding H264 1080p to H265@ approx 65fps is that fast or too slow?

 

[kgp]

I like you to know that currently I use the MSI airboost bios. I have to flash it to 200283 however I noticed that the MSI airboost bios delivers more information. I see now also RPM of the fan which was not visible with the original Sapphire Biosses if I'm correct.

ioreg -l |grep \"PerformanceStatistics\" | cut -d '{' -f 2 | tr '|' ',' | tr -d '}' | tr ',' '\n'|grep 'Temp\|Fan'
"Fan Speed(%)"=30
"Fan Speed(RPM)"=1506 <---(*)
"Temperature(C)"=27

(*) See 1500 RPM idle is definitely working with VGTab. So now its just a matter of finding the optimal settings

PS. 1500RPM @idle is quite loud ....
PS2. Encoding H264 1080p to H265@ approx 65fps is that fast or too slow?

I you feel that 1500 RPM are still too loud, further lower the fan speed but carefully watch GPU temps especially under full GPU load conditions.. evidently, you might also have to lower frequs and voltages in this case..

 

[apfelnico]

@kgp
A new device: "Thermal SubSystem"
Thanks to "ANONYMOUS WRITER" for the first step, after some trying I could integrate it.

    Scope (\_SB.PCI0)
    {
        Device (THSS)
        {
            Name (_ADR, 0x00140002)  // _ADR: Address
            Name (THSS, One)
            Method (_DSM, 4, NotSerialized)  // _DSM: Device-Specific Method
            {
                Store (Package (0x0C)
                    {
                        "AAPL,slot-name",
                        Buffer (0x09)
                        {
                            "Built In"
                        },

                        "built-in",
                        Buffer (One)
                        {
                             0x00                                         
                        },

                        "name",
                        Buffer (0x24)
                        {
                            "Intel X299 Series Thermal Subsystem"
                        },

                        "model",
                        Buffer (0x24)
                        {
                            "Intel X299 Series Thermal Subsystem"
                        },

                        "device_type",
                        Buffer (0x13)
                        {
                            "Thermal-Controller"
                        },

                        "compatible",
                        Buffer (0x0D)
                        {
                            "pci8086,a2a1"
                        }
                    }, Local0)
                DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
                Return (Local0)
            }
        }
    }

 

[YPSuperman]

Please post your EFI zip.

Are you using AptioMemoryFix-64.efi and not any other Aptio fix? (The zip in 1st post has all the necessary kexts and .efi files to get you started)
Also CsrActiveConfig should be set to 0x67 on config.plist

Hey,
Thx a lot for your reply!!
I am using the aptioMemoryFix-64.efi and also the AptioInputFix-64.efi.
CsrActiveConfig is set to 0x67 on config.plist..

I attached my EFI folder so you can hopefully fing my mistake(s)!

best,
Phil

 

[rawx]

Thanks a lot for this thread !

But, why you don't use this CPU ? https://www.amazon.com/dp/B07BRVNM4M/?tag=tonymacx86com-20

It's the native Imac Pro CPU right?

Best,

 

[apfelnico]

@rawx

Because …
• the processor is more expensive
• you have to use another board (C422 Chipset)

 

[YPSuperman]

@kgp

Hi

Thx for your awesome guide! Maybe you could help me with my installation issues?
I followed your guid as good as possible but somehow the installation crashes with:
"Couldn´t allocate runtime area"

I Uploaded a picture of the issue and my EFI Folder. I really hope there is a solution to be found!

Thx for everything and best greetings,
Phil



My System:
Asus Rog Strix X299
Intel Core I9 7940
Gigabyte Gtx1080 Windforce
64gb G-Skill DDR4

 

[kgp]

@kgp

Hi

Thx for your awesome guide! Maybe you could help me with my installation issues?
I followed your guid as good as possible but somehow the installation crashes with:
"Couldn´t allocate runtime area"

I Uploaded a picture of the issue and my EFI Folder. I really hope there is a solution to be found!

Thx for everything and best greetings,

Phil

Phil, everything in your EFI-Folder seems alright.. BTW.. THE CPU core ACPI replacements you enabled are for the i9-7940X?

Thus, I really don't know what causes the memory allocation errors with your mainboard..

Try to enable "above 4G decoding" in your BIOS... If this does not help try to reflash the BIOS..

Cheers and good luck,

KGP

 

[RuleBreaker01]

@rawx

Because …
• the processor is more expensive
• you have to use another board (C422 Chipset)

There is one more thing :
• The 7980XE is much faster since you can overclock it, what is not possible with the Xeon. ;-)

 

[RiLinux]

PRIME X299-DELUXE BIOS 1503
"Improve system stability and performance.
Update ME firmware to version 11.11.55.1509.