VRM modify ICC_MAX to run high Current/TDP OEM processors

[RolloZ170]

Hello, can this method be used to modify the "inspur-NF5820M5" motherboard?

if inspur uses a well known VRM controller and you can find access to the VRM PMBus, then yes.

 

[RolloZ170]

View attachment 28331
The motherboard of 'impur NF5820M5' happens to have I2C0_ PWR three pin interface, but I am not sure if it is this interface that is used to modify VRM. Could you please answer the question

can you find the Ground pin in I2C0_PWR ?
if we know the pinout we can connect a MCP2221a device there and make a Bus scan.

 

[rooloor]

can you find the Ground pin in I2C0_PWR ?
if we know the pinout we can connect a MCP2221a device there and make a Bus scan.

Yes, but I don't know how to find a Bus scan.

 

[RolloZ170]

Yes, but I don't know how to find a Bus scan.

install the MCP2221 Terminal and click Advanced settings.
set Address lenght to 7 bit and scan from 10h to 7Fh.

 

[rooloor]

install the MCP2221 Terminal and click Advanced settings.
set Address lenght to 7 bit and scan from 10h to 7Fh.

Can you send me the download link for MCP2221 Terminal
I've been searching for a long time and can't find MCP2221 Terminal.

 

[RolloZ170]

Can you send me the download link for MCP2221 Terminal

MCP2221 I2C/SMBus Terminal (v2.0.1)

MCP2221A

The MCP2221A is a USB-to-UART/I2C serial converter which enables USB connectivity in applications that have a UART and I2C interfaces. The device reduces external components by integrating the USB termination resistors and the oscillator needed f ...

www.microchip.com

 

[rooloor]

Hi @ RolloZ170, here is the reading of scanning mcp2221a on the motherboard. Which address should I use? thank you

 

[RolloZ170]

View attachment 28336
Fill in 0x2E,0x42 or 0x56 at Start Address？

download my cli app extract to folder. open cmd window, navigate into folder.
type in prompt, and report output.

"MCP2221a_iccmax_FF.exe -PXE1610C 2E"
"MCP2221a_iccmax_FF.exe -PXE1610C 42"
"MCP2221a_iccmax_FF.exe -PXE1610C 56"

 

[rooloor]

I failed.

 

[rooloor]

???

Unable to unlock, thank you for patiently guiding me.

 

[RolloZ170]

Unable to unlock, thank you for patiently guiding me.

what happens ?
unable to unlock what ? used all addresses ? maybe there is another I2C header.

 

[rooloor]

what happens ?
unable to unlock what ? used all addresses ? maybe there is another I2C header.

Okay, I'll give it a try.
By the way, do you know how to modify the BIOS? Start the motherboard with the modified BIOS, and the diagnostic card code will automatically shut down after displaying 92, which seems to be related to a watchdog!

 

[RolloZ170]

added Dell PowerEdge T640, R640, R740

 

[RolloZ170]

updated X11SPL / X11SPM 255W TDP modd to BIOS 3.9