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

[richard.dzavoronok]

Hopefully, with some motre research it should be possible to get in touch directly with a Polish reseller.

I tried really hard to do a detective work as you can hide blur effect from the website on sellers info.
You get first letters and numbers from all the data (with following asterix symbols). But IIRC, the number of asterixes is randomly added, so that can't help you.
I gave it two days, but couldn't find any company that could fit into those breadcrumbs.
That's when I paid for membership and contacted the seller.

Also I noticed there is " Sale also to private individuals " note in sellers info.

 

[Unrest5078]

I don't think so. They are just mediator for sales.
Two years ago I purchased their membership for ~160 eur. I got the contact info to seller, but they told me the ad was already expired.
Long story short, I got a refund.

Sellers could be scammers, but that's up to you to decide.

Paying 160 euros just to contact a seller in a classified ad in 2025 (and recommending it on a tech forum)... dude, if you really paid that, well. Wishing you smooth sailing in all your future endeavors.

 

[richard.dzavoronok]

Paying 160 euros just to contact a seller in a classified ad in 2025 (and recommending it on a tech forum)... dude, if you really paid that, well. Wishing you smooth sailing in all your future endeavors.

Thanks a lot for the good wishes.

The mere reason I shared that ad is simple math. This board is selling at >200 eur on ebay right now (if you are lucky).
If 4 members would group up and pay for the membership and bought 4 units, that would cost ~456 eur -> 114 eur per unit.
86 eur savings which is easily 3700x.

 

[Unrest5078]

You're welcome. I didn't challenge your math, rather your common sense.
Why would a seller paywall such a sought-after item in the first place, and sell it at that price, when the first search would pop its market value/price?
Anyway sorry for the offtopic, and I really wish you all the best, please take care.

 

[luckylinux]

I should have gotten this Gigabyte Motherboard while it was on Sale back then, instead of this **** ASROCK Rack B450D4U-V1LQ5 which is stripped down to the Core, has a ***** buggy BIOS, extremely poor CPU Support between different Architectures, no IPMI and what else I didn't discover yet.

There is a whole other Thread about it in the same Forum Section as this for those interested. From BIOS Mods of different Kind to Hardware/DIY Solutions etc.

This Gigabyte Motherboard seems like a much better Deal overall, even at 100 EUR, compared to the 25 EUR of the ASROCK Rack B450D4U-V1LQ5 .

 

[AlexGee]

Glad I have 3x Gigabyte MC12-LE0:

I keep one as spare part and will sell my Asrock Rack X470D4U.
One is for my fileserver and one for my backup server with many old 4TB HDDs

 

[Cruzader]

I got 12x MC12-LE0 in use and a few spares in a shelf, i somewhat regret not buying even more.

I am increasingly tempted by the MC62-G40 board PIO has tho, to start replacing some storage nodes with more flash if they would take 150-200€ area per board.
But its getting close to just getting epyc.

 

[Unrest5078]

got almost everything setup, bought the mobo for 140 euro, have the 4650pro, 64gb ram (not ecc) - and a nice saggitarius black case

Couldn't passthrough the onboard sata controller, so got a cheap x16 adaptor for bifurcation (which only worked 4.4.8 not 8.4.4) which I use for a sata x 6 ports m2 adapter and a nvme on the other side.

I'm debating whether to place the m2 sata x6 adaptor directly on the mobo m2 slot and move the proxmox boot nvme on the x16 adaptor. But my infrastructure is old, still having only gigabit connection and cables, so I don't think I would benefit for the swap.

Also, coming from OMV bare, and proxmox with zfs being new to me I would ask you:
could I run proxmox bare and install directly mergerfs+snapraid and keep the data on my existing ext4 6 hdds?
I don't know how I would migrate the data to reformat them to zfs, and I don't really want that, I think it's overkill for a media server data.

The alternative would be to passthrough the hdds and run omv in a vm... though I was thinking I could finally ditch omv now with a proper nas
Any advice is welcome!

I love my new nas! I have been using my plex nas - asrock j5005 mobo/cpu in my fractal node for 7 years, turning it off everytime I would leave home, for fear my picopsu would catch fire
It proved to be a real champ though.
But now I "might" notice an improvement

All the best!

 

[etorix]

bifurcation (which only worked 4.4.8 not 8.4.4)

4650 APU: x4x4x4x4 is not available.

The M.2 slot is x1, so it really is only suitable for boot.

m2 sata x6 adaptor

That sounds like a SATA port multiplier and should not be used with ZFS.

I don't know how I would migrate the data to reformat them to zfs

Simple: You can't.

I was thinking I could finally ditch omv now with a proper nas

OMV is a NAS OS. Proxmox is not a NAS; it can't serve files.

What exactly are you trying to achieve?

 

[b3rrytech]

That sounds like a SATA port multiplier and should not be used with ZFS.

M.2 to 6x SATA with the ASM1166 controller is relatively common and works great with ZFS. Not a port multiplier.

 

[luckylinux]

I am increasingly tempted by the MC62-G40 board PIO has tho, to start replacing some storage nodes with more flash if they would take 150-200€ area per board.
But its getting close to just getting epyc.

EPYC seems almost cheaper and probably better upgrade-ability and availability in the 2nd Hand Market.

It's still WAY more expensive than what I would like to buy.

Advantage of the Threadripper is Higher CPU Frequency. EPYC has higher # of Cores though.

So if multi-threaded it's probably a Tie. If single-threaded, Threadripper wins (assuming same Generation of Zen 2 / Zen 3 / Zen 3+ / etc).

 

[SlowmoDK]

The M.2 slot is x1, so it really is only suitable for boot.

It stil does 985Mb/s, so probably fine for SATA controller with HDD's and moderate use (ASM1166 controller is only x2 natively)

OMV is a NAS OS. Proxmox is not a NAS; it can't serve files.

Promox is just Debian uder the hood, it can very easily be a great NAS, and many use it as such.
Plus it's one of the best for ZFS besider TrueNAS

 

[luckylinux]

Promox is just Debian uder the hood

With a somewhat Patched Ubuntu Kernel. So sometimes / many Times you get all the Quirks from Ubuntu with System that either Kernel Panic or don't boot at all.

Don't get me wrong, I use Proxmox VE for all my Virtualization Hosts . But from Time to Time, on some Hosts, there is "something" going wrong, where you end up to manually need to pin (and set in Grub Configuration) a Default Override for which (previous) Kernel to boot in order to avoid Kernel Panics etc.

EDIT 1: It's just a bit more complicated than Debian under the hood. Yes, the Base is Debian and Proxmox VE can be installed on Top of Debian. That's actually the Way I set them up by (installing first Debian Bookworm on my Hosts, reboot, then install Proxmox VE, then reboot again and I'm basically in a Proxmox VE Setup by then) .

But some Packages are conflicting / customized by Proxmox Team and some Core Features need adaptation. Just try to use the Watchdog as you would do normally in a Vanilla Debian Setup, you'll be surprised that you CANNOT. You must use Proxmox VE Fencing / HA Feature, even though you don't need/use High Availability at all. Kinda Confusing and Documentation is ... let's say lacking .

 

[_Dejan_]

Couldn't passthrough the onboard sata controller, so got a cheap x16 adaptor for bifurcation (which only worked 4.4.8 not 8.4.4) which I use for a sata x 6 ports m2 adapter and a nvme on the other side.

For me passthrough SATA(All ports) to TrueNAS Core VM on proxmox and this board work without any issue...
You need correct BIOS settings to enable IOMMU groups and if remember this kernel parameter:

pcie_acs_override=downstream,multifunction

Then after reboot you see SATA controller in own IOMMU group and can be used in virtual machine without efecting other devices...

With a somewhat Patched Ubuntu Kernel. So sometimes / many Times you get all the Quirks from Ubuntu with System that either Kernel Panic or don't boot at all.

Don't get me wrong, I use Proxmox VE for all my Virtualization Hosts . But from Time to Time, on some Hosts, there is "something" going wrong, where you end up to manually need to pin (and set in Grub Configuration) a Default Override for which (previous) Kernel to boot in order to avoid Kernel Panics etc.

EDIT 1: It's just a bit more complicated than Debian under the hood. Yes, the Base is Debian and Proxmox VE can be installed on Top of Debian. That's actually the Way I set them up by (installing first Debian Bookworm on my Hosts, reboot, then install Proxmox VE, then reboot again and I'm basically in a Proxmox VE Setup by then) .

But some Packages are conflicting / customized by Proxmox Team and some Core Features need adaptation. Just try to use the Watchdog as you would do normally in a Vanilla Debian Setup, you'll be surprised that you CANNOT. You must use Proxmox VE Fencing / HA Feature, even though you don't need/use High Availability at all. Kinda Confusing and Documentation is ... let's say lacking .

Why you didn't use Proxmox VE ISO installer and just install Proxmox VE without first installing Debian and avoid issues whcih you have(conflicting packages)?

 

[luckylinux]

Why you didn't use Proxmox VE ISO installer and just install Proxmox VE without first installing Debian

Because somebody "smart" in Proxmox made their Installer (at least something like 6+ Years ago, when I started using it) that would NOT boot correctly on Systems without enough VGA Memory and therefore could NOT install.

This included, of course, Server Motherboards such as my (at the Time) Supermicro X10SLL-F/X10SLM-F.

and avoid issues whcih you have(conflicting packages)?

Uh ? I don't have conflicting Packages Issues because of my Installation Method ! Why do you assume I am having conflicting Packages because of my Installation Method? You clearly did NOT read my Post

But some Packages are conflicting / customized by Proxmox Team and some Core Features need adaptation. Just try to use the Watchdog as you would do normally in a Vanilla Debian Setup, you'll be surprised that you CANNOT. You must use Proxmox VE Fencing / HA Feature, even though you don't need/use High Availability at all. Kinda Confusing and

Even if you install Proxmox using the official Installer, it's still based on Debian Bookworm so the Repository Configuration in /etc/apt/ is exactly the same.

Sometimes it's also good to have another Kernel to boot, should the Proxmox VE Kernel be too stubborn and keep panicking on some Systems (Problem was since fixed, therefore I once again removed the Debian Kernel). You can anyway install a custom Kernel or Debian Vanilla Kernel from a Rescue chroot using a LiveUSB or something like that. Proxmox Developers do NOT reccomend that, but hey, if their Kernel keeps crashing within 5 Seconds after GRUB Menu, what are People supposed to do ? I tried netconsole but that didn't work unfortunately over netcat .

Anyways, to be honest I want to customize my Installation to use ZFS on Root over LUKS so not sure the official Installer would do that. I came up with my own set of BASH Scripts that gather all the Learnings over the Years. And I can also use that to install Debian, Ubuntu, etc.

Back to the original Topic ... EVERYBODY would have Packages Conflict, should they try e.g. to setup the Watchdog according to pretty much every Tutorial on the Internet.

Try it yourself. If you hit yes or y, this will remove your entire Proxmox VE Packages:

apt install watchdog

The Solution is of course to use pve-ha-manager which, very counter-intuitive, does NOT do (only) High Availability but also provide a standalone Watchdog Function.

For Systems that have IPMI, configure /etc/default/pve-ha-manager as follows:

# select watchdog module (default is softdog)
WATCHDOG_MODULE=ipmi_watchdog

In /etc/modprobe.d/ipmi_watchdog.conf put the following:

options ipmi_watchdog action=power_cycle panic_wdt_timeout=10

And disable the nmi_watchdog in /etc/default/grub.d/watchdog.cfg:

GRUB_CMDLINE_LINUX="${GRUB_CMDLINE_LINUX} nmi_watchdog=0"
GRUB_CMDLINE_LINUX_DEFAULT="${GRUB_CMDLINE_LINUX_DEFAULT} nmi_watchdog=0"

EDIT 1: the pcie_acs_override=downstream,multifunction Parameter IIRC has Security Implications, depending on your Use Case. And at least on Intel Systems, it wasn't until a while ago that it was supported anyways. Not sure about AMD. Maybe I tried to pass those SATA ports to a VM, but that attempted to pass the entire Chipset Devices (USB, PCIe, Ethernet, ...) which the pcie_acs_override=downstream,multifunction should, if properly supported and implemented, break up the IOMMU Groups into separate ones.

In my case I think it didn't work. Or there was some Devices which got Pass-through to the VM but then the HOST had a Kernel Panic (that was probably because the SATA Controller got passed through to the VM). Since then, I basically did without PCIe Passthrough on that Host. It just didn't work as expected (with an AMD Radeon Graphics Card) and I lost way too much Time troubleshooting that .

 

[_Dejan_]

Do you have MC12 board? Asking because you are talking about Intel CPU's which can't be used on this motherboard... Im use PVE ISO installers on different systems(HP Servers from Gen 9 with Intel CPU's, Supermicro Epyc board, Gigabyte AMD Ryzen and Epyc's boards, Intel NUC's, Dell and HP mini desktop PC's...) and never have any issue... But if remember correctly Im start using PVE with version 6.X and never try/use older versions...

I don't know what you do wrong on your system but for me work on MC12 board with Ryzen 5600 CPU... I dont remember what I need enable in BIOS to get it work... But probably everything about IOMMU and ACS need to be enabled... I don't get any kernel errors or crashes... Before I reboot system one week ago because Im remove it from rack case and it will be replaced it has run(Uptime) few days less than 200 days...

I can and I'm passtrough ONLY SATA Controller to VM(TrueNAS Core):



As you can see I have SATA, USB, I210 devices seperated in own IOMMU groups and can passtrouh them seperate to VM's ...

 

[luckylinux]

Do you have MC12 board?

No, as said above, I wish I would have gotten this instead of the ASROCK Rack B450D4U-V1LQ5 .

Asking because you are talking about Intel CPU's

That's because most of my Experience on Proxmox VE has been on Intel Systems. Xeon E5 v1/v2 (soon v4), Xeon E3 v3/v5/v6.


On an AMD Ryzen based ASUS ROG STRIX B550-A GAMING I get this, where USB3, Ethernet and SATA (plus 2 other PCIe Slots where the Hailo 8L PCIe Accelerator are installed) are in the same IOMMU Group 13:

Group 0:    [1022:1482]     00:01.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 1:    [1022:1483] [R] 00:01.2  PCI bridge                               Starship/Matisse GPP Bridge
Group 2:    [1022:1482]     00:02.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 3:    [1022:1482]     00:03.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 4:    [1022:1483] [R] 00:03.1  PCI bridge                               Starship/Matisse GPP Bridge
Group 5:    [1022:1482]     00:04.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 6:    [1022:1482]     00:05.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 7:    [1022:1482]     00:07.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 8:    [1022:1484] [R] 00:07.1  PCI bridge                               Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
Group 9:    [1022:1482]     00:08.0  Host bridge                              Starship/Matisse PCIe Dummy Host Bridge
Group 10:    [1022:1484] [R] 00:08.1  PCI bridge                               Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
Group 11:    [1022:790b]     00:14.0  SMBus                                    FCH SMBus Controller
        [1022:790e]     00:14.3  ISA bridge                               FCH LPC Bridge
Group 12:    [1022:1440]     00:18.0  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 0
        [1022:1441]     00:18.1  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 1
        [1022:1442]     00:18.2  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 2
        [1022:1443]     00:18.3  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 3
        [1022:1444]     00:18.4  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 4
        [1022:1445]     00:18.5  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 5
        [1022:1446]     00:18.6  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 6
        [1022:1447]     00:18.7  Host bridge                              Matisse/Vermeer Data Fabric: Device 18h; Function 7
Group 13:    [1022:43ee] [R] 01:00.0  USB controller                           500 Series Chipset USB 3.1 XHCI Controller
USB:        [05e3:0608]         Bus 001 Device 003                       Genesys Logic, Inc. Hub
USB:        [0b05:1939]         Bus 001 Device 002                       ASUSTek Computer, Inc. AURA LED Controller
USB:        [1d6b:0002]         Bus 001 Device 001                       Linux Foundation 2.0 root hub
USB:        [1d6b:0003]         Bus 002 Device 001                       Linux Foundation 3.0 root hub
        [1022:43eb]     01:00.1  SATA controller                          500 Series Chipset SATA Controller
        [1022:43e9]     01:00.2  PCI bridge                               500 Series Chipset Switch Upstream Port
        [1022:43ea] [R] 02:00.0  PCI bridge                               Device 43ea
        [1022:43ea]     02:01.0  PCI bridge                               Device 43ea
        [1022:43ea]     02:02.0  PCI bridge                               Device 43ea
        [1022:43ea]     02:03.0  PCI bridge                               Device 43ea
        [1022:43ea]     02:08.0  PCI bridge                               Device 43ea
        [1022:43ea]     02:09.0  PCI bridge                               Device 43ea
        [1e60:2864] [R] 05:00.0  Co-processor                             Hailo-8 AI Processor
        [1e60:2864] [R] 06:00.0  Co-processor                             Hailo-8 AI Processor
        [8086:15f3] [R] 08:00.0  Ethernet controller                      Ethernet Controller I225-V
Group 14:    [1002:1478] [R] 09:00.0  PCI bridge                               Navi 10 XL Upstream Port of PCI Express Switch
Group 15:    [1002:1479] [R] 0a:00.0  PCI bridge                               Navi 10 XL Downstream Port of PCI Express Switch
Group 16:    [1002:73ff] [R] 0b:00.0  VGA compatible controller                Navi 23 [Radeon RX 6600/6600 XT/6600M]
Group 17:    [1002:ab28]     0b:00.1  Audio device                             Navi 21/23 HDMI/DP Audio Controller
Group 18:    [1022:148a] [R] 0c:00.0  Non-Essential Instrumentation [1300]     Starship/Matisse PCIe Dummy Function
Group 19:    [1022:1485] [R] 0d:00.0  Non-Essential Instrumentation [1300]     Starship/Matisse Reserved SPP
Group 20:    [1022:1486] [R] 0d:00.1  Encryption controller                    Starship/Matisse Cryptographic Coprocessor PSPCPP
Group 21:    [1022:149c] [R] 0d:00.3  USB controller                           Matisse USB 3.0 Host Controller
USB:        [1d6b:0002]         Bus 003 Device 001                       Linux Foundation 2.0 root hub
USB:        [1d6b:0003]         Bus 004 Device 001                       Linux Foundation 3.0 root hub

Note that I am NOT right now using pcie_acs_override=downstream (I tried for a while but it did NOT help in my Use Case).

It is also possible that this consumer Motherboard just happens to have a **** PCIe and IOMMU Groups Arrangement .

Im use PVE ISO installers on different systems(HP Servers from Gen 9 with Intel CPU's, Supermicro Epyc board, Gigabyte AMD Ryzen and Epyc's boards, Intel NUC's, Dell and HP mini desktop PC's...) and never have any issue... But if remember correctly Im start using PVE with version 6.X and never try/use older versions...

Not sure I was on older Versions either.

Anyways, that's like Proxmox VE Developers saying they rigorously test their Images & Updates and it's very Rare People have Issues. Maybe 0.1% or so of People have Issues according to them.

So what ? That's like saying that Airplanes are the safest Transportation Method (well, maybe not in the US anymore right now). Does it really matter when YOU are on the Plane that is falling ?

Ever since I had to do that workaround because their stupid Installer couldn't cope with 16MB of VRAM or whatever the Issue was, I first installed Debian and the Proxmox VE on top of it and never looked back.

I don't know what you do wrong on your system

Sure, it's me doing something wrong on my System . I'm 100% the ONLY ONE with Issues. If you looked at Proxmox VE Forums you'd see that there are a lot (in absolute Terms, NOT in Percentage) of People affected by some of their Kernel Updates.Systems that once Rock Solid start to reboot at random.

It kinda pisses me off that People start Questioning what I'm doing wrong and why I'm going through all these "Hacks" when the System just works. Well, if the System would just work plug & play, *maybe*, just *maybe*, then I wouldn't lose so much Effort and Time for nothing. It's NOT like I'm having fun ! Sure, I learned many Things, but I wish I didn't need to invest so much Time .

but for me work on MC12 board with Ryzen 5600 CPU... I dont remember what I need enable in BIOS to get it work... But probably everything about IOMMU and ACS need to be enabled...

Not sure I have an Option in BIOS for that. On the ***** ASROCK RACK B450D4U-V1LQ5 the BIOS almost has no Options at all, like even enabling ECC on Ryzen 5700X required a "Hack" / BIOS Mod ...

I don't get any kernel errors or crashes...

Usually if it works it works, and if it doesn't work, from my Experience, you find out within a few Seconds of GRUB Menu ... I also have Systems that are up since a long Time (and only Rebooted to update Kernel etc).

I can and I'm passtrough ONLY SATA Controller to VM(TrueNAS Core):

View attachment 43725

As you can see I have SATA, USB, I210 devices seperated in own IOMMU groups and can passtrouh them seperate to VM's ...

That's NOT the case on the ASUS (Consumer) System I tested it on. I have two other AMD Ryzen Systems on Consumer Motherboards, I didn't try those.

Plus these ASROCK Rack B450D4U-V1LQ5 but I don't recall anything about ACS in the BIOS.

EDIT 1: actually checking the disassembled BIOS, the ASROCK Rack B450D4U-V1LQ5 has an ACS Setting in the BIOS (which requires an AER Setting to be enabled). I think it's however hidden, so again some "Hack" / BIOS Mode is probably required.

 

[b3rrytech]

I don't know who the seller is as I don't have premium Merkandi account, but this looks like a good deal? The prices are excluding VAT so only for EU VAT registered.
Seller is from Pland and motherboard comes with Gelid cooler.

I recommend the offer: Gigabyte MC12-LE0 Re 1.0 AMD B550 AM4 Ryzen 5000 4000 3000 motherboard + new cooling - Poland, New - The wholesale platform

For sale 1000pcs Gigabyte MC12-LE0 Re 1.0 AMD B550 AM4 Ryzen 5000 4000 3000 motherboards with new coolers. The boards are designed for servers. Specification: -

merkandi.com

edit: user->seller
edit2: added additional info

I was curious to see if I could find out whom the seller was, without a membership.

Managed to copy the first letter/number from each address line and after an hours detective work I found it. The seller is ENTER Maciej Sobkowiak in Leszno, Polen. I contacted them with an enquiry to purchase some boards but unfortunately this is an old posting and they have no boards any more. They don’t have any new ones coming in either.

Too bad, but it was quite a rush to actually figure out who the seller was with so little information.. So worth it somehow..

 

[richard.dzavoronok]

I was curious to see if I could find out whom the seller was, without a membership.

Managed to copy the first letter/number from each address line and after an hours detective work I found it. The seller is ENTER Maciej Sobkowiak in Leszno, Polen. I contacted them with an enquiry to purchase some boards but unfortunately this is an old posting and they have no boards any more. They don’t have any new ones coming in either.

Too bad, but it was quite a rush to actually figure out who the seller was with so little information.. So worth it somehow..

You're much better detective than me! I got only until I figured out Leszno