VRM modify ICC_MAX to run high TDC OEM cpu

[ThreeFiveFox]

X11DPH-T is running with dual xeon platinum 8171m's!! Super happy to have gotten this working. Thanks @RolloZ170

 

[love1810]

Has anyone successfully modified it on a Lenovo P720 workstation? I followed the modification method of Lenovo P920. After the modification, the CPU became hot, but the monitor had no output and the keyboard light was not on. Please advise

 

[RolloZ170]

Has anyone successfully modified it on a Lenovo P720 workstation? I followed the modification method of Lenovo P920. After the modification, the CPU became hot, but the monitor had no output and the keyboard light was not on. Please advise

CPU ? , BIOS ?

 

[Zhengrankela]

Lenovo P720 has BIOS verification. If you modify the BIOS and damage the checksum, it will automatically power down

 

[Zhengrankela]

This should be a set of logic used by Lenovo on laptops. Verify Ami BIOS through external BIOS modules. I recommend flashing back the backed up BIOS or trying to find the troubleshooting module of the Lenovo plugin and remove it. The default BIOS supports CPUs with 4, 5, 6, and 7 steps. Do you want to use the P8124 or ES processor？

 

[RolloZ170]

Lenovo P720 has BIOS verification. If you modify the BIOS and damage the checksum, it will automatically power down

no problem, we do not modify BIOS.

 

[Zhengrankela]

no problem, we do not modify BIOS.

It seems that he is using an unsupported CPU, and the BIOS lacks microcode corresponding to the CPU

 

[RolloZ170]

It seems that he is using an unsupported CPU, and the BIOS lacks microcode corresponding to the CPU

let us wait for him to report the CPU type and BIOS version.

 

[Rahvin9999]

I want to give my thanks to @RolloZ170.

Was able to mod my X11DPU motherboards that did not already have an unlocked VRM

Also managed to do the VRM modify on my supermicro X11DSC+ board.

Everything like a charm and my servers are now rocking Xeon 8275CL cpu's without a hitch.

 

[bahungidol]

Can we do this mod to run 8124M on lenovo p920 ? Thanks.

 

[Zhengrankela]

Can we do this mod to run 8124M on lenovo p920 ? Thanks.

true

 

[RolloZ170]

Can we do this mod to run 8124M on lenovo p920 ? Thanks.

8124M yes, but P-8124 not supported by stock BIOS (stepping B1 cpuid 50653)

 

[Zhengrankela]

in fact it dos not support any step 0 1 2 3 cpu , because the microcode is lack in the bios

 

[RolloZ170]

in fact it dos not support any step 0 1 2 3 cpu , because the microcode is lack in the bios

to be correct the lack makes it not unsupported ( Xeon E5 hack, remove microcode )
and the existance of the microcode means not 100% supported in any cases,

 

[Zhengrankela]

to be correct the lack makes it not unsupported ( Xeon E5 hack, remove microcode )
and the existance of the microcode means not 100% supported in any cases,

Indeed, that's the case. However, Lenovo's AMIBIOS verification protection mechanism has been giving me a headache for a year. Although the P720/920 uses AMIBIOS, Lenovo has developed its own protection mechanism. There is no protection mechanism on the motherboard in the absence of BMC, which detects whether the BIOS has been modified. If there is any modification, the power will be immediately shut down. .. Fortunately, I purchased Lenovo's factory BIOS through Taobao, which is called DebugBIOS by Supermicro. It contains microcode 01234 internally, allowing me to successfully power on the P8124

 

[Aaron2099]

with MCP2221a CLI software, "xxx.exe -scan 10 7F"
should be give you found devices. if not = problem.

Tandda and me too.

you can use other ground contact from anywhere. but Ground must contacted first.

Tandada problem as me too
2 items

 

[RolloZ170]

Tandada problem as me too
2 items

you get this because no device found/connected to the MCP2221a, even not a unsupported device.
no connection, bad connection, defective MCP2221a, VRM controller not powered...
sorry i can not help with this.

 

[Aaron2099]

Hi...
Dell R740xd mod done , top perfomance now, xeon 8272cl
Thanks RolloZ170

my server dell R740, but it can not update

 

[Aaron2099]

So I have 1100w power supplies coming. They were only $19.
I was noticing something. The header we used from your guide is P4 and it’s close to the VRM section for cpu2. I noticed close to the cpu1 VRM section, there is a P7 header. Could that be something we are interested in?

I removed the CPU and memory of Dell R740, leaving only the motherboard. I plugged in the power supply, but I was unable to update data using the SCL GND SDA connection. I couldn't find the VRM controller. How did you operate it? Thank you

 

[Aaron2099]

Hi...
Dell R740xd mod done , top perfomance now, xeon 8272cl
Thanks RolloZ170

His problom been solved,the result is his MCP2221A device was broken being caused his every move were failed.
My laptop connect his MCP with 000000000 device id.

View attachment 42427

I removed the CPU and memory of Dell R740, leaving only the motherboard. I plugged in the power supply, but I was unable to update data using the SCL GND SDA connection. I couldn't find the VRM controller. MCP2221A USB problem ？