I recently ran into this post while searching solution for the problem I am experiencing with ES processors on C621E Sage Motherboard. I recently got a C621E motherboard to build a workstation setup with some Cascade Lake ES processor from a friend QRA9 (B0 Stepping for 5218) and QRGE (L0 Stepping for 5218B). I have two modules of Hynix 16GB modules from the Approved AVL list. Initially the board was giving 66 or bb (depends how we read it) with beeps. After updating BIOS via USB flashback to the latest 5701 from Asus website, those errors stopped but the board doesn't boot beyond EE and does not complete POST with no display on screen at all. I tried moving back and forth and earlier versions (5503 and 5602) has no affect and system acts as if the CPU is missing. Spent quite some time to get this up but in vain. Currently my setup has a single QRA9 CPU. If this setup works I plan to add another CPU of the same type to make it dual. Any help to move forward will be appreciated.

EDIT: I figured two part of the issue, first one being using a known good CPU, tried using QN0D Bronze and was able to get past all the earlier glitches. But I feel what made things move quick was a BIOS posted earlier by @Lost_N_BIOS that really seem to have done the trick. Thank you so much for posting it. Also this is first time I am building a PC in like 4-5 years and was not pressing Power button on the motherboard after each BIOS upgrade.
Now the only problem i am observing is that it has i do not see any video, but i do see that keyboard appears to be functional (by checking the Caps Key and Num Lock light on keyboard) and Ctrl+Alt+Del works. Also I am not sure if it will be feasible to enable support for the QRA9 and QRGE version of the processors.

how are you getting video? via a DGPU or through the VGA adapter that came with the MB? if you are using eiterhone make sure your jumpers for both are set to enabled. they are located one on top of the other in the middle bottom of the board. you will need to consult your manual.

Cheers ;
Hello friends, I am new here.
I feel the question I have seen that they have managed to modify lka bios for the c621e sage.

My question is what has the bios functions correctly with 2 cpu's. I have a great offer of this motherboard and 2 cpu but they are engineering samples and I don't know if they will work on the motherboard correctly since the problems are historical.

motherboard at the price of $ 415 new
cpu Xeon gold 6142 is QL28 170 $ used "engineering sample".
https://www.ebay.es/itm/Intel-Xeon-Gold-...tem23b8f317ff:g: 5B4AAOSwjIta1IF1

Zitat von dgjoma im Beitrag #333

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Cheers ;
Hello friends, I am new here.
I feel the question I have seen that they have managed to modify lka bios for the c621e sage.

My question is what has the bios functions correctly with 2 cpu's. I have a great offer of this motherboard and 2 cpu but they are engineering samples and I don't know if they will work on the motherboard correctly since the problems are historical.

motherboard at the price of $ 415 new
cpu Xeon gold 6142 is QL28 170 $ used "engineering sample".
https://www.ebay.es/itm/Intel-Xeon-Gold-...tem23b8f317ff:g: 5B4AAOSwjIta1IF1

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Hi All and Happy New Year !
So, my lack of research made me buy a Gigabyte C621 dual 3647 board, and I did this only because of the Thunderbolt 3 option, not knowing that adding microcodes for the ES is such a delicate thing to do.
Now,
My actual question is —- any of the C621E Sage owners could confirm is the board has TB3 support? I can’t find anything in the manuals but looking at the pics seems like there is a TB connector.
Plan is to sell the Gigabyte board and buy a Sage for my two ESs. Unfortunately they are already tested by many people so I cannot help your development any further.
Appreciated:)

@blackrunnero - Often, gigabyte leave in ES compatibility, or at very least you may need to simply add back microcodes. Did you try all BIOS, if yes and no luck, did you try all BIOS with added microcode per your CPU?

Hi. Thanks for the reply
Yep. Tested all bioses. Bought a cheap Bronze for the tests and sent it back. Board is C621-WD12
If you say is not that hard I could keep it for testing purposes and this way maybe I could contribute to your research.
Until then, If someone could confirm that the Asus supports Thunderbolt I’ll buy it.
Thank

Hi there,

I have a question and was hoping someone here might know more about it,
Just bought a WS C621E and two Platinum 8160 ES QL1K (processor ID 50652) and now I need to buy some memory and that's where my question is about. Can I use 2933 or 3200 MHZ RDIMMS in combo with these CPUs and if so which part numbers are known to work?

Hi
Intel states 2666 for these CPUs so, from my knowledge, higher freq. memory will drop down to 2666. overclocking on Xeons, I don’t think it’s a good option.
You might want to chose from tested memory list from Asus.
Cheerio

Hi

>>> Crucial 16GB DDR4-2933 RDIMM CT16G4RFD8293 <<<

Went for these and they work, they drop to 2666 yes but I won't have to buy new ram when I upgrade the CPUs ... :)

Cheerio

Sorry I didn’t reply earlier. Really busy with work.
I didn’t manage to find a Sage board with Thunderbolt into the UK.
For some reason the fully removed the connector from the motherboard and the Thunderbolt options from bios.
So now, I am ready to start the testing on the Gigabyte C621-WD12.
I have 2 programmers, a CH341a and TL866II plus. Soic 8 and 16 adapters.
Could you please point me in the proper direction for how to actually replace the cpuid inside the bios?
I have all the software I could find, Uefi Tool, MMtool.
I can manage the reading, writing and verification of the bios chip but my experience in modding the bios is limited.
Thank you in advance :)

Update.
Created the new bios file. Compared to the original and looks fine.
I can’t seem to find a way to flash it.
This board doesn’t have a bios flashback option.
Tried FPT and it gave me an unsupported platform error.
Is the desolder of the chip my only option?
Thanks

Hi
Is it ok to upload the original and the modded bios over here?
I would kindly ask if you can take a look and tell if the updated one is ok
Also, I don’t know about the ME. If it needs update or, if case, how can be updated.
I have no flashback option for this board so I will desolder the chip.
The board came with F1 bios dated Feb 2019. I created the modd from the latest, F7. Anyways Gigabyte took all the old bioses out of the website. I need to be on F7 as the old ones have audio and serial issues.
Thanks

You should probably create a new thread for your board rather than tacking onto the end of this one. People are more likely to see your posts and offer help that way.

I was thinking on that too.
Thanks