its worked,thanks a lot!just change these 2 options and write,im i right?its on now,but not stable test yet
VRM modify ICC_MAX to run high TDC OEM cpu - English only
- Thread starter RolloZ170
- Start date
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8259CL X2 on X11DPI-NT
its boot now,but not stable test yet,any other thing need to be change?or something worng to change these 2 options?
yes but only ICC_MAX, and for both of the two 2955A (20,21)
not stable says nothing to me. too hot ? do better cooling...
usualy 8259CL have low performance with latest mcicrocode, you may have to run with other BIOS(microcode)
the processors can be bad, bad socket connection(reseat).
Use Passmark Memtest86 to check if DRAM CPU connection is good, and also your DRAM and the DRAM controllers in the CPU. Only memtest that can talk to CPU error counter registers with ECC. Open source memtest86+ or Microsoft memtest all useless, I tested them all.
Use a Linux with rasdaemon and recent kernel, compile a kernel in RAM through the night in a loop to see if some errors occur. Find old posts on here where I talk about stress-ng to test further.
If machine survives 24h torture, good. If machine crashes and reboots, a CPU core is likely faulty. Find my instructions on here with keyword isolcpus to disable a core and its hyperthread sibling. 23 core 46 thread CPU Xeon Platinum for 100 fiat that can use 1 TB Optane still a good deal.
Dear @RolloZ170,
I have successfully modified VRM ICC MAX on Dell T7920. and trying to run Intel Xeon Platinum P-8124 but i am not getting display. Only Fans start running on high speed.
wait till 15-20 minutes but no success.
Can you please guide me what to do?
TIA
I have successfully modified VRM ICC MAX on Dell T7920. and trying to run Intel Xeon Platinum P-8124 but i am not getting display. Only Fans start running on high speed.
wait till 15-20 minutes but no success.
Can you please guide me what to do?
TIA
Hello everyone, according to the tutorial provided by RolloZ170, my Dell 7920T successfully modified the ICC_MAX and used the 8251C CPU. I will show you my operation process, hoping to help you.
View attachment 27566
First introduce my starting point:
I own a 7920T, motherboard number is P/N 60K5C, using a gold medal 6150 CPU, when I directly replace it with an 8251 CPU, it will blink yellow power light and keep restarting.
In order to rewrite the ICC_MAX, we need to buy a MCP2221A, luckily, I only found one shop from Taobao that had it in stock (yes, I'm from China, please forgive me for using Google Translate), and some Dupont wires.
So let's get started.
First, you need to connect the MCP2221A to the motherboard, and solder the Dupont wires to the SCL, SDA, and GND of the MCP2221A. Find the PJPP2 on the 7920T main board, at first I tried to solder the DuPont wire, but this is the first time I use a soldering iron, I didn't succeed, so I inserted the pin of the DuPont wire into the SCL and GND of the main board PJPP2, these two holes The bit is empty, keep the pin angled after inserting it, and tape it in slightly to keep the pin and solder point in contact. Connect the SCL and GND of PJPP2 on the main board to the SCL and GND of the MCP2221A. Start 7920 and enter BIOS.
Operate another computer, download the EXE provided by RolloZ170, use the terminal to enter the folder after decompression, and enter the first command (don’t press Enter first), then take a Dupont cable to connect to the SDA of MCP2221A, hold the Put the needle on the SDA of the main board PJPP2 (it is a solid solder joint), at this time, press Enter with the other hand, wait for about five seconds, you can release SDA, and check the terminal execution results:
Not surprisingly, you should see some ReadBlock and WriteBlock operations, otherwise, please check your related connections, and observe whether there is "ReadBlock( Page20,cmd73,2) ICC_MAX=FF00" in the result, if not, Please try to repeat the first command until it is observed (I did not succeed the first time, when I restarted the 7920 and entered the BIOS again. After executing the first command, I succeeded), when he appears, it means the first The command has been successfully modified, then connect to SDA again and execute the second command, you will get the result "ICC_MAX already 255A - modification skipped." Congratulations, your 7920T has successfully modified ICC_MAX. Disconnect the power supply of MCP2221A and 7920T, replace it with 8251C, start 7920, it works normally.
PS:
The first command: ./MCP2221a_iccmax_FF.exe -PXE1610C 60
The second command: ./MCP2221a_iccmax_FF.exe -PXE1610C 62
EXE:
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Many thanks to RolloZ170 for the tutorial and help.
Platinum P-8124 is B1 stepping(50653), not included in actual Dell BIOS.
Platinum 8124(M) or 8175M will work.
B1 is only supported out of the box by gigabyte.
so far nobody successfully modded Dell BIOS(signed, BIOS guard)
i checked that, no 7X20T BIOS includes B1.
don't know what machine. I can only know when I found out for myself ago.
if there is no header, you have to connect too the VRM controller(which?) by soldering.
Poor H3C, it seems to have no debugging pins for VRM. I just received a H3C R4700G3 motherboard, trust me, I will solve it. Additionally, this is the motherboard connection method for the inspur SA5212M5 (the same as SA5112M5)
I remember that Dell workstations do not have BIOS verification (because they do not have onboard iDrac), so it should be possible to support 0653 CPUs by modifying the BIOS. By the way, it seems that Dell servers with iDrac need to add microcode by modifying the initial BIOS (without service code). Someone on XianYu successfully modified the BIOS of a Dell PowerEdge server using P8124, which seems to have been modified using the initial BIOS.
The verification of Dell IDRAC9 is not as strict as ILO's silicon verification, and its key seems to be written during the initial startup, related to service code and southbridge (just speculation)
