EU Gigabyte Mainboard MC12-LE0 Re1.0 AMD B550 AM4 Ryzen

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helskor

New Member
Aug 26, 2023
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I have one running a 5900X and another a 3600X without any issues, which BIOS and BMC versions are you on?
Also maybe try with just one stick of ram in B1 (check the manual but I'm pretty sure that's the 1 stick config)
 

lklaw

New Member
Jun 4, 2025
7
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I have one running a 5900X and another a 3600X without any issues, which BIOS and BMC versions are you on?
Also maybe try with just one stick of ram in B1 (check the manual but I'm pretty sure that's the 1 stick config)
I've done the RAM dance with every combo of A0/A1/B0/B1. BMC is 12.61.35, and tried both BIOS F19 and F20
 

zr0dfx

Member
Jul 7, 2024
89
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UK
How long are you giving it to post? It can take several min as the BMC boots first. Like 5 min (ok thats a bit extreme) but it does feel like a long time.
 

luckylinux

Well-Known Member
Mar 18, 2012
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I've done the RAM dance with every combo of A0/A1/B0/B1. BMC is 12.61.35, and tried both BIOS F19 and F20
Are you sure it's not doing POST just fine, but it's the Display Output / KVM that is broken ?

I don't have this Board and I don't have IPMI on my ASROCK Rack B450D4U-V1LQ5 but for sure the AMD Ryzen 7 2700X was an absolute PITA with recent BIOS Versions on that ASROCK Motherboard.

No VGA Output, no Rear USB Ports working, PCIe x16 Slot defaulting to Bifuration x4x4x4x4.

Only Solution in my Case was to install a x8 Riser Cable in the x8 Slot and wire an old external GPU there. Then I would finally get a Video Output and I could see that it was posting properly. Just Boot was NOT configured to boot from any Device so my LiveUSB couldn't be found on the DHCP Server Static Leases :( .

Not sure if relevant to your Case, but in my case I also thought it wasn't posting, but the DEBUG LED (with the BIOS Codes) would do its "Looping" and the LED Bios Code turn off after a while, indicating normal Boot.

Board was Posting, it was "just" the VGA not outputting any signal with this BIOS Version & CPU Architecture :).

EDIT 1: @lklaw, did you try F18 ?

it could be that you have an Issue with the latest AGESA 1.2.0.E

1749224127469.png

I have found at least one Thread online where at least one User had Issues and downgrading to AGESA 1.2.0.C seemed to help.

Since F19 has been upgraded to AGESA 1.2.0.E, maybe it's worth checking F18 to see if at least that one works for you.
 
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zr0dfx

Member
Jul 7, 2024
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33
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UK
You also need to use the VGA output on the mobo. A graphics card won't work for post and bios screen.
 

lklaw

New Member
Jun 4, 2025
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I've set up the system again. VGA output on the board doesn't work, BMC now also doesn't lease DHCP. Guess it's a return...
 

SlowmoDK

Active Member
Oct 4, 2023
258
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I've set up the system again. VGA output on the board doesn't work, BMC now also doesn't lease DHCP. Guess it's a return...
if in europe i'll take it for 40 €, despite state, i'll do postage too :)
I've yet to see a dead board, and i've seen quite a few for trouble shooting
 
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legoxx

New Member
Jan 31, 2025
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I have been running this board/ryzen 5600x happilly for a while now, mainly as a proxmox with some dockers, lxc, vm's and zfs smb shares.
Recently I have noticed that powertop is showing only C1/C2 states, has anybody achieved something higher? if so what bios settins have you used? thank you (I'm on 12.61.21 and F18 bios)
 

luckylinux

Well-Known Member
Mar 18, 2012
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I think AMD Ryzen doesn't go above C2 in General, it has a different "Naming Convention" than Intel, you will NOT be getting States like C8-C10 etc.
 

legoxx

New Member
Jan 31, 2025
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it turned out that you need different tool for amd processors (GitHub - hattedsquirrel/ryzen_monitor: Monitor power information of Ryzen processors via the PM table of the SMU - thanks Wolfgang!)
after bit of tinkering with proxmox headers and libraries incompatibility here is the output ╭───────────────────────────────────────────────┬─────────────────────────────── - Pastebin.com

most of the cores are in C6 most of the time, what i guess is good.

My homelab is taking around 65-75W on average (5600x, 5xNVME, 2x HDD, zigbee usb dongle) is that a lot?
 
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SlowmoDK

Active Member
Oct 4, 2023
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it turned out that you need different tool for amd processors (GitHub - hattedsquirrel/ryzen_monitor: Monitor power information of Ryzen processors via the PM table of the SMU - thanks Wolfgang!)
after bit of tinkering with proxmox headers and libraries incompatibility here is the output ╭───────────────────────────────────────────────┬─────────────────────────────── - Pastebin.com

most of the cores are in C6 most of the time, what i guess is good.

My homelab is taking around 65-75W on average (5600x, 5xNVME, 2x HDD, zigbee usb dongle) is that a lot?
Main system at home here is at 75w idle with 5600x,128Gb ECC, 4x 20tb HDD, 4x Intel 4610 1.92Gb SDD, and 25Gb Mellanox ConnectX-4 NIC, no spindown or powesave on HDD's
System has 3 NVMe, 16gb Intel Optane for boot, and 2x Intel Optane 116GB for sync writes and readcache on HDD pool

SATA ports expanded with m2 ASM1166 on 4x4x4x4 bifucation card
 
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jurek224466

New Member
May 24, 2024
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Hey I'm trying to post with the Ryzen 5 4650G but no success so far, I hope you guys could help me.

System specs:
  • Motherboard: GIGABYTE MC12-LE0
  • PSU: Cooler master MWE 550.
  • RAM: 2 sticks of Kingston ECC KSM32ES8/8HD
  • CPU: AMD Ryzen 5 4650G
  • BMC: 12.61.21 (latest version)
  • BIOS: Updated to F18 (latest version)
  • I'm checking POST status via BMC and H5 viewer (shows "no signal")
What I've Already Tried
CPU Testing

  • Installed Ryzen 5 4650G - no POST
  • Got the store to replace the 4650G with another one - still no POST (they say they test the CPUs before selling, but I could not confirm this)
  • Tested with a borrowed Ryzen 5 3600 - successfully POSTs (with non-ECC RAM, did not remember to test with my ECC Ram).
RAM Testing
  • Tried one ECC RAM stick in every slot (A0, A1, B0, B1) with the 4650G - no POST
  • Tested with non-ECC RAM - still no POST with the 4650G
  • (The non-ECC RAM works fine with the Ryzen 3600)
Troubleshooting Steps Completed
  • Updated BIOS to latest version (F18)
  • Cleared CMOS multiple times
  • Tried booting with minimal configuration (just CPU and one RAM stick)
  • Tried booting with CPU but no RAM (did not hear any beep codes)
-----
What Should I Try Next?
I'm trying to avoid buying additional parts that might not solve the issue. What would you recommend?
  • Try another power supply?
  • Try a different APU model?
  • Any other troubleshooting steps I might have missed?
Any help would be greatly appreciated! I've spent many hours on this issue already and I'm running out of ideas.
Thanks
Hi,

I had exactly the same problem. I had RAM, two Ryzen 7 3700x processors and it got to the point where I was sending the boards to support because I didn't know what was wrong. After I gave up for a while I recently bought two CPUs (Ryzen 5 5600x and Ryzen 7 5600x, RAM I had from the QVL list and now both boards work fine. I would check that you put one bone in slot A1 and that the CPU is working. Unfortunately, the board is capricious and BIOS updates at the time did not help or BMI.
 

hirschma

New Member
Jan 4, 2025
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Hi,

I had exactly the same problem. I had RAM, two Ryzen 7 3700x processors and it got to the point where I was sending the boards to support because I didn't know what was wrong. After I gave up for a while I recently bought two CPUs (Ryzen 5 5600x and Ryzen 7 5600x, RAM I had from the QVL list and now both boards work fine. I would check that you put one bone in slot A1 and that the CPU is working. Unfortunately, the board is capricious and BIOS updates at the time did not help or BMI.
Just posting this for posterity - Ryzen Pro CPUs that hit the market are typically factory pulls, and are often vendor-locked. Short story is that most of these CPUs just won't run in anything besides the original box they were installed into.

I had to go through multiple CPUs from sketchy vendors until I got a 4750G that ran. It's really lovely.

Bash:
 $lscpu
Architecture:             x86_64
  CPU op-mode(s):         32-bit, 64-bit
  Address sizes:          48 bits physical, 48 bits virtual
  Byte Order:             Little Endian
CPU(s):                   16
  On-line CPU(s) list:    0-15
Vendor ID:                AuthenticAMD
  Model name:             AMD Ryzen 7 PRO 4750G with Radeon Graphics
 

hirschma

New Member
Jan 4, 2025
5
1
3
Hi,

And do you have any information on what 32GB 3200MHz RAM dice work outside of the QVL list?
Does this help? This is what's in my machine (four of them):


Bash:
Memory Device
    Array Handle: 0x002F
    Error Information Handle: 0x003E
    Total Width: 72 bits
    Data Width: 64 bits
    Size: 32 GB
    Form Factor: DIMM
    Set: None
    Locator: DIMM_P0_B1
    Bank Locator: BANK 1
    Type: DDR4
    Type Detail: Synchronous Unbuffered (Unregistered)
    Speed: 3200 MT/s
    Manufacturer: Micron Technology
    Serial Number: F3xxxxxx
    Asset Tag: Not Specified
    Part Number: 18ADF4G72AZ-3G2B3  
    Rank: 2
    Configured Memory Speed: 3200 MT/s
    Minimum Voltage: 1.2 V
    Maximum Voltage: 1.2 V
    Configured Voltage: 1.2 V
    Memory Technology: DRAM
    Memory Operating Mode Capability: Volatile memory
    Firmware Version: Unknown
    Module Manufacturer ID: Bank 1, Hex 0x2C
    Module Product ID: Unknown
    Memory Subsystem Controller Manufacturer ID: Unknown
    Memory Subsystem Controller Product ID: Unknown
    Non-Volatile Size: None
    Volatile Size: 32 GB
    Cache Size: None
    Logical Size: None
Pretty sure that they were actually Micron branded, don't think they're on the QVL. FYI. Got a super bargain on used sticks from eBay.
 

conf_f

New Member
Feb 24, 2024
19
15
3
I run 2x Kingston 9965745-042.A01G on one MB and 2x Kingston 9965745-026.A00G on anaother

works perfectly fine. Be careful not to buy accidentially RegECC sticks, not every offer on eBay is clear and they are often cheaper than unregistered ECC.... Just bought 32 GB RegECC for a Gigabyte MJ11 for total 50 bucks.... (incl. tax and shipping)
 
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hirschma

New Member
Jan 4, 2025
5
1
3
I run 2x Kingston 9965745-042.A01G on one MB and 2x Kingston 9965745-026.A00G on anaother

works perfectly fine. Be careful not to buy accidentially RegECC sticks, not every offer on eBay is clear and they are often cheaper than unregistered ECC.... Just bought 32 GB RegECC for a Gigabyte MJ11 for 50 bucks....
Just for price guidance - I got my four sticks of ECC 32GB 3200 for $118 - less than a $1/GB :) Considering that DDR5 is becoming cheaper (got 96GB "gaming" RAM for $189 during recent sales), I'd expect that used DDR4, no matter the flavor, is going to be very cheap on the used market for a while.
 
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