VRM modify ICC_MAX to run high TDC/TDP OEM processors

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RolloZ170

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Apr 24, 2016
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jason879

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I'm able to mod Dell T7820 to work with 8259CL by this guide. Huge thanks to RolloZ170 for the guide and program.

Here is the parts I ordered.

Adafruit MCP2221A Breakout

STEMMA QT / Qwiic JST SH 4-pin to Premium Male Headers Cable - 150mm Long

Premium Female/Female Jumper Wires - 20 x 12" (300mm)

The hardest part is to take out the motherboard from the chassis and soldering the pin to the board. As mentioned in the guide the ground hole is blocked by copper. I end up just solder the two pin from the back and leave the gnd pin on the copper blocked hole (I don't have 0.8mm drill bit around).

For T7280 it's PJPP1 by the memory slot.

T7820-2.jpg

Pin

T7820-6.jpg


The cable is color coded you just need 3 of them.
  • Black - Ground
  • Blue - I2C SDA Data
  • Yellow - I2C SCL Clock
T7820-4.jpg

Once its connected with USB boot to the BIOS and run the commands:

MCP2221a_iccmax_FF.exe -PXE1610C 60
MCP2221a_iccmax_FF.exe -PXE1610C 62

Reboot and put in the CPU.

T7820-5.jpg
 
Last edited:

Lonik030383

New Member
Mar 26, 2023
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hi. help me please. i have board "intel s2600st. i cant find points to make connection
I2C SDA Data
I2C SCL Clock

any idea ...????
Regards
 

RolloZ170

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Apr 24, 2016
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hi. help me please. i have board "intel s2600st. i cant find points to make connection
I2C SDA Data
I2C SCL Clock
must be in the chipset area ( J5D2 @ S2600WFT ) but maybe similar label.
locate the PXE1610C and use a multimeter with the beep function.
 

RolloZ170

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Apr 24, 2016
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hi. i found pinout , "J2J2" , direct going to the 8/9 connection SDA/SCL on PXE1610C.
But shows me error , look picture please, any idea..???
can be all.swapped SDA/SCL
have you powered the board ? with CPUs and which ?
probably you have entered wrong address(es), you cannot expect the same addresses as used by S2600BP,S2600WFT
install MCP2221Terminal and scan the bus for devices.
 

RolloZ170

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Apr 24, 2016
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try
MCP2221a_iccmax_FF.exe -PXE1610C 40
and
MCP2221a_iccmax_FF.exe -PXE1610C 60

note: if my app does not find a PXE1610C nothing is happen, just timeout or not found...
 
Last edited:

Lonik030383

New Member
Mar 26, 2023
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60 - success
62 - success

who should be first , who i second...???
i need do something else..???

Regards
 

Lonik030383

New Member
Mar 26, 2023
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propper f...k board :cool::cool::cool::cool:

instruction

1 - Need update bios for new version , build date 03/21/2023 (new cpu microcode , new microcode of ram controller) , if without update - you will see message - "memory error" , system wont start.

2 - connector J2J2 / smbus. (1-SDA/2-GND/3-SCL)

3 - MCP2221a_iccmax_FF.exe -PXE1610C 60
4 - MCP2221a_iccmax_FF.exe -PXE1610C 62


fully forks
 

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