Great, they unhid the option for you! Is this in the same location I mentioned it would be located? If not, send me that BIOS, and let me look, unhide the one I'm talking about, maybe it could help?
Or, still could just be this particular memory isn't playing nice with this board/BIOS.

@raun0 @e97 - Did you guys change the ECC Support Setting from Auto to enabled? If not, that may help, auto may be setting disabled.

Yep. Exactly where you said it would be.

I don't think its a module compatibility issue since they work fine, only without ECC enabled. I've tried multiple other ECC modules that have verified to work in the previous generation X79/C602 and also same generation X99/C612 systems.

Their engineers said they've confirmed it to be working so its likely a misconfiguration on my part or they are still working out the memory timings / settings. I'll know for sure in a few days!

Also this post was helpful in verifying physical trace connection: https://www.bios-mods.com/forum/Thread-R...e-P6T-Deluxe-V2

RDIMM datasheet = ECC pins on RAM modules
DIMM connector datasheet = pins to motherboard connector / layout
Xeon datasheet = ECC pins on CPU
Xeon / Socket Mechanical Guide = CPU pins to motherboard socket / layout

** Be careful as the pins are delicate!! **

After finding the pins, use a multi-meter with ohm/resistance capability to check if they are connected!

** Be careful as the pins are delicate!! ** (x2 because its important)

My alternative is to get an open source BIOS implementation like CoreBoot working on the board.. it will be an adventurous challenge!

Maybe something in the ECC chip itself may not be compatible. So you've now tried others sets as well, none work? Have you tried all these with only 1-2 sticks at a time?

Is your CPU microcode up to date/latest? If not, maybe that could be causing some issue too, at least it's something you could try updating to see if it helps, while you wait on them to reply. It's cool they replied to you quickly and sent out new BIOS

Their support is great! Its a recently released motherboard mainly for gamers, hence the LEDs.. My use case, professional/workstation use, is not what they typically see so I'm happy to work with them to get everything working as the board has great features.

If the modules were the problem, at least the ECC memory controller in edac-utils would be recognized but its not showing up.

[    2.802091] EDAC MC: Ver: 3.0.0
...
[   36.071500] EDAC sbridge: Seeking for: PCI ID 8086:2fbb
[   36.071525] EDAC sbridge: CPU SrcID #0, Ha #0, Channel #0 has DIMMs, but ECC is disabled
[   36.071555] EDAC sbridge: Couldn't find mci handler
[   36.071570] EDAC sbridge: Couldn't find mci handler
[   36.071586] EDAC sbridge: Failed to register device with error -19.
 

Also in dmidecode on 4 of 8 modules show up, but system memory shows the correct amount.

I tried many configurations and documented the results: 1 stick, 2 sticks, 4 sticks in various sockets and 8 sticks.

Tried setting to "Enable". No luck.

I think its NVRAM, MSR or other conflicting setting or lack of proper initialization. Its also possible the traces are not connected so that should be verified, but in my case they are connected.

That's nice to hear, I've only seen them mentioned a few times, and I thought they were like some small, cheaper, OEM type that made generic boards.

I know nothing about what you mention above, do you mean that even if the ECC control chip on the memory stick was bad or not compatible, you'd still see something you are missing above?
If yes, then sounds like they need to look into this more for you, especially since they are confirming working and OK on their end.

@e97 Dump your current BIOS for me, since you mentioned NVRAM, yes it could be locked disabled or auto in there still, especially if flashing commands didn't destroy and rebuild new NVRAM when you flashed in the new BIOS.
I will make you mod BIOS, with it enabled everywhere Usually, there is three main locations this can be set as a BIOS setting, in setup module, in AMITSE/SetupData (This is what AMIBCP Changes when you change a default setting value), and in NVRAM.
In NVRAM, there is often two main volumes, especially if you can dump with programmer, and then there is a third and sometimes 4th in the internal BIOS volumes too.

If this is Intel System, dump with FPT. If it's AMD, there may be issues, unless you have a flash programmer, or already know what AFU can flash in MOD BIOS on this system

If Intel, here's how in case you don't know - Check BIOS main page and see if ME FW version is shown, if not then download HWINFO64 and on the large window on left side, expand motherboard and find ME area, inside that get the ME Firmware version.
Once you have that, go to this thread and in the section "C" download the matching ME System Tools Package (ie if ME FW version = 10.x get V10 package, if 9.0-9.1 get V9.1 package, if 9.5 or above get V9.5 package etc)
Intel Management Engine: Drivers, Firmware & System Tools

Once downloaded, inside you will find Flash Programming Tool folder, and inside that a Windows or Win/Win32 folder. Select that Win folder, hold shift and press right click, choose open command window here (Not power shell).
At the command prompt type the following command and send me the created file to modify >> FPTw.exe -bios -d biosreg.bin

Right after you do that, try to write back the BIOS Region dump and see if you get any error, if you do show me image of the command entered and the error given >> FPTw.exe -bios -f biosreg.bin

If you are stuck on Win10 and cannot easily get command prompt, and method I mentioned above does not work for you, here is some links that should help
Or, copy all contents from the Flash Programming Tool \ DOS folder to the root of a USB Bootable disk and do the dump from DOS (FPT.exe -bios -d biosreg.bin)
https://www.windowscentral.com/how-add-c...creators-update
https://www.windowscentral.com/add-open-...menu-windows-10
https://www.laptopmag.com/articles/open-...ator-privileges

This is the board:



as far as I know the only LGA2011-V3 that supports DDR3 !

Large or small I dont know. I do know they sell quite a few boards and also sell them to OEMs.

For ECC, modern x86_64 CPUs (made in the last decade) have the memory controller integrated into the CPU itself. The ECC memory is "dumb" in the sense that it has an extra chip and hardware to calculate a checksum for the other 8 bits of data but that is also treated as data. Hence non-ECC is 64-bit data and ECC is 72-bit data.

These modules can correct a single bit error and detect but not correct multi-bit errors. They will show this kind of information:

Error Correction Type: Single-bit ECC
 

There are more advanced ECC modules like these HP modules that also have a "controller" on the RAM itself and can detect and correct multi-bit errors. Many vendors have this multi-bit ECC under various trade names. They show this kind of info:

Error Correction Type: Multi-bit ECC
 

I've read there is/was a generation of ECC modules that had the controller on the RAM itself to work with non-ECC CPUs/motherboard but I've not come across these personally.

Looks like a fairly decent board, not what I was thinking when I see this name. I've only seen them mentioned a few times though, I think I modified a X89 for someone not long ago and we discussed how that was an odd chipset name

Be sure to see my reply to you here - X99 ECC support (2)

While I dont think they are quite at the level of the Tier 1s ( Asus, Gigabyte, MSI, ASRock) who have released hundreds if not thousands of motherboards.

For having only released to consumers less than 10 boards, the quality of this board is spectacular. I love the ATX-24 pin and 8-pin layout and DR DEBUG which is not covered up by the GPU. The boot speed is very fast. Aside from the ECC issue, everything else works. Once that is resolved, it is a perfect board for me.

Also how many Tier 1s will provide support and a new BIOS over the weekend? Without expensive support contracts? I can't think of any. Though I have had good experience with ASRock Rack service and anyone you pay nicely for the support contract.

Plus, I even got macOS 10.14.5 running on this board fairly quickly so the quality of the ACPI implementation is good.

Here is the prototype case I built for this system : )

See my edit above

Nice build and layout. That material looks thick, is it heavy?

@Lost_N_BIOS Here is the latest BIOS - it was a full flash including NVRAM with

AfuEfix64.efi KLX99.BIN /P /B/ /N /X
 

If this does not include everything, let me know and I will get a flash dump with SPI programmer. This board has a SOIC-8 chip and I only have SOIC-16 clip so it will take time to wire it up manually.

Thank you. I did not see it!

I replied and attached the latest BIOS, if possible lets move those posts here to keep everything related to this board in a single thread.

It is quite light! The case is <3kg and is made of 3mm aluminum angle. The beams are hollow, but can withstand 60 kg before deforming. The heaviest component is the water in cooling loop

@e97 - Why no /K?

I want an actual dump from your current BIOS on board, this is only way to fully edit the NVRAM, and yes, if you have flash programmer that would be preferred as it will be much easier for you to program back in after I edit.
Or, you could, if needed, unlock BIOS and or SMI/SMM lock, if they are enabled, but we can't know until you do the above (if Intel).
If AMD, then programmer only would really be best, since it's a pain in the arse to properly and fully flash in a mod BIOS with all regions I would be editing, and it makes a mess using /GAN with these kinds of edits due to multiple /GAN flashes required.