VRM modify ICC_MAX to run high TDC OEM cpu

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kevip36

New Member
Oct 10, 2024
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I understand that you have successfullly modified it. I can buy Adafruit MCP2221 as well. But I'm a newbie I don't know how to connect Adafruit to the motherboard of P920. Can you have an image for the connector? I'm just a script kiddies so I must follow all by image :) Sorry about that. Anyway, so much thanks!
 

RolloZ170

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Apr 24, 2016
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But I'm a newbie I don't know how to connect Adafruit to the motherboard of P920. Can you have an image for the connector? I'm just a script kiddies so I must follow all by image
"and we have successfully modified a Lenovo P920 motherboard: "
we, not me.
the I2C header is not populated, you have to solder.
ask a friend who can hold a soldering iron on the right side...
 

kevip36

New Member
Oct 10, 2024
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and we have successfully modified a Lenovo P920 motherboard:
controllers are PXE1610C
addresses are 60/62(7bit) same like Dell.
I2C header is PJ1100 Pinout:
[1] SCL
(2) SDA
(3) Ground (you can use any other GND or LAN plug shield)
View attachment 39413
you need Adafruit MCP2221a and some jumper cables
i made a c# app for automatic programming(only for MCP2221a). download here
there is a readme inside. read it.

Thanks so much!
 
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ghxst

Member
Oct 2, 2024
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and we have successfully modified a Lenovo P920 motherboard:
controllers are PXE1610C
addresses are 60/62(7bit) same like Dell.
I2C header is PJ1100 Pinout:
[1] SCL
(2) SDA
(3) Ground (you can use any other GND or LAN plug shield)
View attachment 39413
you need Adafruit MCP2221a and some jumper cables
i made a c# app for automatic programming(only for MCP2221a). download here
there is a readme inside. read it.
I love this kind of stuff. Please consider hosting on github/gitlab or similar, there's not many resources out there to get into this kind of thing.
 

SiRWaTT

New Member
Oct 14, 2024
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BIOS version 2.42.0

Just got my another 8259CL. Apparently the second CPU is always +10~15C hotter.

The machine came with 2 x 16GB 2666MT. Wiki says the CPU support is 2666, but some other sites mention 2933.

Curious whether 2933MT works on 8259CL. Planning to get 2933 hoping it could attain 2933...


View attachment 39343
So it is not possible for OEM CPUs with 255A like the 8259CL to work directly on the Dell T7920 even with their latest BIOS (2.42) without modding the VRM of the Motherboard?
 

RolloZ170

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Apr 24, 2016
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So it is not possible for OEM CPUs with 255A like the 8259CL to work directly on the Dell T7920 even with their latest BIOS (2.42) without modding the VRM of the Motherboard?
correct. intel ME/SPS blocking CPU.
 

Zhengrankela

Member
Oct 12, 2024
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Hello! I am a homelab player in China. Thank you for providing such a great guide. I have made my LNV HR650X run normally with a high TDP CPU (P8124)
There is an old saying in China, called 'When many people gather firewood, the flames rise high' (I am not sure if this translation is accurate). I will list my BIOS modification tutorial and some server compatibility tests later in the following text. The tutorial is translated from Chinese, and some parts may not be fully conveyed. Please forgive me. Additionally, I would like to ask if you agree with me translating the tutorial you published into Chinese and then posting it on the Chinese internet (of course, I will indicate the source and author)
The following is the main points of the tutorial I wrote on CPU selection and BIOS modification for the LGA3647P0 platform
1) Detailed explanation and existing problems of each step CPU
2) Guide to adding microcode to AMI BIOS (taking HR650X as an example)
3) Compatibility test results of high TDP CPUs from other manufacturers
Provide the following documents
1) H3C C35 C32 platform (R4700G3 R4900G3 R4300G3) full-step BIOS file
2) Lnv universal 1U 2U platform (SR650 SR630 HR650 HR630) full step BIOS file
3) Lnv tower workstation (P720) full step BIOS file (if anyone has obtained the BIOS file for P920, please contact me privately)
4) MMTOOLS AMIBCP5 Intel CSME and other tool software
5) All microcode for the LGA3647-P0 platform
6) Intel microcode update manual
7) Other miscellaneous items (all microcode for the C612 platform, E5V3 forced Turbo frequency modification tool, bootguard modification method, insyde h2o BIOS modification tool, etc.)
The microcode for each step is extracted from the Intel C620 series design specification server NeroCity, and in principle supports all LGA3647-P0 CPUs (FPGA CPUs require modifications to the motherboard rather than BIOS)
I will post the guide and document in the forums after finishing them in a few days. (Currently, the high-power modification test of the Inspur node server is in progress.)
At present, because the guide has not been completed, I would like to remind HPE DL560/580G10 server users that there is a four-way whitelist in HPE's BIOS. Currently, my testing does not support four-way P8124 and P8136. These two CPUs only support dual-way or single-way on DL560/580G10. It's quite laughable, isn't it. The current test results can support the CPU after step 4 to perform four-way. Including the ESCPU of step 5, which is the platinum ES CPU starting with QQ.
At present, HPE's BIOS can be said to be unsolvable. The public-private key encryption mechanism of ILO5 cannot be cracked. :(
 
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RolloZ170

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Apr 24, 2016
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I have made my LNV HR650X run normally with a high TDP CPU (P8124)
but you have noted the issue is not TDP, it's TDC value.
e.g.
8272CL TDP=195W / TDC=255A
8222CL TDP=200W / TDC=255A
i fa motherboards supports 205W std. SKU, there is no TDP block in the BIOS.
 

kevip36

New Member
Oct 10, 2024
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My Lenovo P920 is running with dual gold 6138. If I do the modification, can I continue to use dual 6138 ? Or I must change to new 8171m or 8272cl
 

Zhengrankela

Member
Oct 12, 2024
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Okay. seems that I have fallen into a strange circle of certain arguments. In China, we often use the term 'high-power' processor to refer to high TDC processors. This is a mistake. I will correct it. Thank you for your permission and for pointing out.
 

SatonoDiamond

New Member
Aug 25, 2024
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in gods name, who told you connect this way ?


message ! the dongle version is unknown, normal behave.
connect to JVRM1,JVRM2,GND.
I initially used this connection method, but I'm still getting MCU CODE UNKOWN. Could it be like Mion said, 'open BIOS configuration and try connecting again'? Do I have to first use a supported CPU to enter the BIOS before I can scan?
Sorry to trouble you, but could you guide me again?

1017111723.jpg
 

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SakuraX

New Member
Oct 17, 2024
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Hi my friend, I also have an inspur NF5280M5 server, can I buy the MCP2221 programmer like the link below and execute like this?
If the modification is completed, do I still need to plug the MCP2221 into the motherboard? I want to buy two Intel 8259CL CPUs, which consume 210W and should be able to start directly.

eg: