VRM modify ICC_MAX to run high TDC OEM cpu

[RolloZ170]

Sorry, could you help me find the position of I2C line in this machine HPE DL360 Gen10？ Thank you.

https://forums.servethehome.com/index.php?threads/vrm-modify-icc_max-to-run-high-tdc-oem-cpu.38686/post-401923

 

[WANGXIANG]

View attachment 43270

https://forums.servethehome.com/index.php?threads/vrm-modify-icc_max-to-run-high-tdc-oem-cpu.38686/post-401923

Oh, thank you very much.

 

[Zhengrankela]

Okay, let me make another correction. The VRM pin for H3C C35 platform is J266
Among them, 1 scl, 2 gnd, and 3 sda
Because its PMBUS output is hung on the bridge, the multimeter cannot detect it.

 

[Zhengrankela]

Okay, let me make another correction. The VRM pin for H3C C35 platform is J266
Among them, 1 scl, 2 gnd, and 3 sda
Because its PMBUS output is hung on the bridge, the multimeter cannot detect it.

AKA R4900G3 R4700G3

 

[RolloZ170]

Okay, let me make another correction. The VRM pin for H3C C35 platform is J266
Among them, 1 scl, 2 gnd, and 3 sda
Because its PMBUS output is hung on the bridge, the multimeter cannot detect it.

same J266 and pinout on HP DL360/DL380 Gen10, sure ?

 

[Zhengrankela]

same J266 and pinout on HP DL360/DL380 Gen10, sure ?

sure

 

[WANGXIANG]

Sorry, HPE DL360 Gen10, we find some errors when I run MCP2221a_iccmax_FF -PXE1610C 62 64.Why?

 

[WANGXIANG]

I also ran the command MCP2221a_iccmax_FF.exe -scan 20 70, but no devices were detected within the specified I²C address range.

 

[RolloZ170]

Sorry, HPE DL360 Gen10, we find some errors when I run MCP2221a_iccmax_FF -PXE1610C 62 64.Why?

no PXE1610C found

I also ran the command MCP2221a_iccmax_FF.exe -scan 20 70, but no devices were detected within the specified I²C address range.

wrong / bad connection, MCP2221a defective.

 

[WANGXIANG]

no PXE1610C found

wrong / bad connection, MCP2221a defective.

Thank you, I found the reason. The workstation must be powered on, and then run the command.

 

[pvd276]

i scan mainboard foxconn RM760-FX , not show icc_max, only show


scanning at addr: 60
probably TPS53679 found at addr: 60
scanning at addr: 61
probably TPS53679 found at addr: 61
scanning at addr: 62
scanning at addr: 63

 

[RolloZ170]

i scan mainboard foxconn RM760-FX , not show icc_max, only show

scan don't show icc_max. try the mod. and you see.
"MCP2221a_iccmax_FF.exe -TPS53679 60 61"

 

[pvd276]

scan don't show icc_max. try the mod. and you see.
"MCP2221a_iccmax_FF.exe -TPS53679 60 61"

ok, it working
tested 8171M work
8173M work
8259CL not work (maybe bios not support 82xx cpu) it boot but hang when memory init ...

 

[RolloZ170]

8259CL not work (maybe bios not support 82xx cpu) it boot but hang when memory init ...

typical behave for no 2nd Gen support BIOS.

 

[ericzqu]

Just got a Cisco C240 M5, and I found the vrm chip (PXE1610CDN) which is close to a 4 pin header. I cannot read found the trace of the board on what’s leading to the pin. Is there a way to identify them without using fancy equipment? Any help is much appreciated!

 

[RolloZ170]

Just got a Cisco C240 M5, and I found the vrm chip (PXE1610CDN) which is close to a 4 pin header.

header must not have connection even if close to the VRM controller.

Is there a way to identify them without using fancy equipment?

look at the circuit diagram from manufacturer, if you don't have it no.
what helps is: multimeter, magnifying glass or head magnifier.
note: there can be a 20-33ohm series resistor in SDA/SCL signal.
edit:
check if GND is connected to Ground (e.g. any shield)