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
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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
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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

Active 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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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
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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

Active 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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