VRM modify ICC_MAX to run high TDC OEM cpu
- Thread starter RolloZ170
- Start date
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Hello there, hope you're well
I have a P920 with the up to date BIOS. It won't boot with dual 8171M so google research brought me here.
I am wondering, with the MCP2221a and your .EXE is it just a matter of soldering the MCP and connecting the dupont pins to the P920 MB? Or do I also have to solder the motherboard ? And for my understanding, I have to do it twice, once per processor ? Thank you!
if your P920 does not have a header populated you need to solder
or connect to any GND(e.g. USB/TPM header) and hold the SCL/SDA in contact while programming. but this can brick your board of you disconnect the wrong time.
yes, two VRM controller addresses, but they are both accessible over the same I2C header.
a Lenovo P920 motherboard:
controllers are PXE1610C
addresses are 60/62(7bit)
I2C header is PJ1100 Pinout:
[1] SCL <-square pad
(2) SDA
(3) Ground (you can use any other GND or LAN plug shield)
get a MCP2221a pcb, microchip
View attachment 26513
i made a c# app for automatic programming(only for MCP2221a). download here
Thank you so much! Will check it out and see if I'd dare soldering something to my motherboard..if your P920 does not have a header populated you need to solder
or connect to any GND(e.g. USB/TPM header) and hold the SCL/SDA in contact while programming. but this can brick your board of you disconnect the wrong time.
yes, two VRM controller addresses, but they are both accessible over the same I2C header.
a Lenovo P920 motherboard:
controllers are PXE1610C
addresses are 60/62(7bit)
I2C header is PJ1100 Pinout:
[1] SCL <-square pad
(2) SDA
(3) Ground (you can use any other GND or LAN plug shield)
get a MCP2221a pcb, microchip
View attachment 26513
i made a c# app for automatic programming(only for MCP2221a). download here
I'm wondering if the 8174s would be fairly comparable to the 8275cl, they don't have quite the capability on the ram 2666 vs 2933
But the TDP, core count and frequencies seem to be similar, Even a bit higher base clock, I can get a set for half the price...
But the TDP, core count and frequencies seem to be similar, Even a bit higher base clock, I can get a set for half the price...
Solder wires to a 3-pin male header and then just press it against your motherboard and hold it, it only takes a second to actually do the reprogramming
you can reduce this to two(2) wired by connecting to Ground pin of COM port or other header.
Hello,
I am trying to find on a R7920 the PJP1/PJP2 header to solder my 3 pins. I believe to have a T32V9.I spend a good 30 min to try to find it on the board and looking for R7920 in the thread doesn't bring me anyone which uploaded pictures on where to find this header.
Picture enclosed for reference.
PIC
I am trying to find on a R7920 the PJP1/PJP2 header to solder my 3 pins. I believe to have a T32V9.I spend a good 30 min to try to find it on the board and looking for R7920 in the thread doesn't bring me anyone which uploaded pictures on where to find this header.
Picture enclosed for reference.
PIC
they are called different or there are none. i don't have R7920 and i can't help.
And another success. Finally got around to modifying my S2600ST, that is now running with 2x 8272CL. Thanks!
However, the short peaks of 500W+ of power draw, in the bootup phase, is kind-of shocking and awesome at the same time.
My previous tries with 8259CL seemed much more reasonable, concerning power-draw. At least on the X11DDW-NT, where they are running.
On paper the difference between the two models does not seem so big.
It might be, though, that the X11DDW is enforcing some power limits, that the S2600ST is not.
However, the short peaks of 500W+ of power draw, in the bootup phase, is kind-of shocking and awesome at the same time.
My previous tries with 8259CL seemed much more reasonable, concerning power-draw. At least on the X11DDW-NT, where they are running.
On paper the difference between the two models does not seem so big.
It might be, though, that the X11DDW is enforcing some power limits, that the S2600ST is not.
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Thanks for the fast reply, if there are none, then no solution ? Or can I boot with a supported CPU and changed it from within let's say windows server if installed as bare metal ?
I could see the R7920 in the list of supported motherboards "Dell Precision R7920". if it's another name any idea of to where I could start finding the answers ? Checked on dell data sheet it's not mentioned.
i think there is one, but diff. name, diff. location.
the header is wired to the VRM controllers SCL & SDA pins. just measure/trace the way to potential headers.
should be around one of the coltrollers (PXE1610Cxx)
or direct soldering.
some other made it and removed solution later ( i guess )
sure not.
your board lacks one VRM power stage but should still work.