@avd - thanks! Sounds like you mentioned, you need to update to 0501 first, then you can try 3501 for plutomaniac with your non-B0 CPU.
Thank you for your “C621E Adventures” pack @avd . I was hoping to find a dump from 3501 which has newer CSSPS firmware. If you can do it at some point (0401 → 0501 → 3501) then great. It’s ok if it’s too much trouble. Now, the dump after the failed boot is completely broken. I don’t think I’ve ever seen that many errors in ME Analyzer before. It should be used as a stress test benchmark at this point! 
Anyway, the “successful” dump seems weird in the same way as the previous two dumps provided by others here. Meaning, the CSSPS firmware is not really Initialized. When the system is running, can you run the attached spsInfoWin64 with -verbose parameter and show us the output?
SpsInfo4.rar (97.1 KB)
Just wanted to add that I have the ASUS Z11PA-U12 board and it too has the same post error of ‘66’ during PCH init when I slot b0 cpus. Retail works fine.
Dear All, I have just got myself an ASUS WS C621E SAGE I got the board as it was quite reasonably priced compared to Supermicro models, and I am looking to replace my aging EVGA SR2 which is my daily PC.
I suppose what I would like to know is if anyone here has any info regarding a list of working ES or QS CPUS I could buy and use on this board, or if I need to use a modified bios at all?
I have looked around google and there’s not much to go on, apart from a video by Linus Tech Tips where he manages to stuff an ES CPU in, and it worked, the issue he had was memory related, using some lower speed ddr4 allowed it to post.
Thanks for your patience and time and of course your efforts. They are appreciated.
I refuse to let this topic die. We have to keep this going!
Hi, everyone,I will receive my C621E MB next week,I am interested in the bios modding,let us work together.
Hi guys.
Got the WS C621e SAGE sitting here, wondered if anyone had any luck with the ES/QS chips on this board yet as it would be really handy to get them working of ill have to return the board.
LinusTechTips had it working with a pair of the 28 cores…
@TechStream - Can you get it touch with Linus maybe? If yes, maybe he will share special BIOS with you, or be able to tell you what BIOS version and ME/ucodes he had to use?
I’ve learned a lot of assembly lately, and have not looked into this BIOS in a while, so maybe I can find something now? I am super behind though, and that takes time digging around in assembly, but I will try to find some time soon to look again.
*Edit - here is same BIOS as post #4 (801 with known working 50652/50654 microcodes from supermicro model that ran the originally requested ES CPU’s properly)
But, I also modified two checks in PlatformCPUPolicy, changing both from compare eax with 50 06 05 00 (50650h) “Jump if not zero - too xx location” To “Jump if zero” so opposite of original function, unsure if this is the blocks, but good thing I check I think
Please only test this BIOS if you know you can recover from bad flash! Flash via USB Flashback (Rename to WSC621ES.CAP)
http://s000.tinyupload.com/index.php?fil…750941480350872
This may have been discussed before, but are you sure the samples Linus used were actual ES, or just QS? If they were QS, or an ES with the retail B1 stepping, they would have worked fine on the stock BIOS.
Yes, thanks @_haru - we’ll never know unless someone can actually talk to Linus, and he actually remembers or still has the CPU’s on hand.
Your right they were a QS sample H0 stepping
Did you find out from him directly @TechStream ?
@_haru - do you know why B0 is not working, do you think block or some incompatibility?
IIRC it id’d as GenuineIntel 0000 right? so not a true QS, but the retail stepping.
@Lost_N_BIOS I don’t think it’s a ucode issue, but a ME issue.
I checked his video and you can see it in the video he is using a QS 28 core HO stepping chip. So although an intel confidential, not a ES.
@_haru thanks for your thoughts. I’ve previously switched out exact ME version and exact settings from a known working with B0 supermicro board, no luck, so I think there must be some block
I made two changes at CPUPolicyDXE module in test BIOS at #149, both where instances where it compared something with the 5065x CPU mask. Hopefully someone can test that with B0 50654 or 50652
I will give this a shot this evening.
I also have a 4110 in the post so will be able to do some comparison with a running machine if required.
Ooo please let us know how you get on!
No joy with this, but my system does operate with the 4110 so no hardware issues at play here.
The machine restarted a good 5 times before first POST with the 4110, presumably updating other things each time. Perhaps this is one of those situations where you must have a working CPU to be able to flash the correct BIOS for the other CPU.