OK!
@wendell told me to get some air on the VRM’s and it worked like a charm.
10+ hours no crashing with AVX-512 enabled.
1 Like
If you can manage great cpu and vrm cooling 3.4ghz ish all core should be long term stable on these CPUs. Incredible clocks for 3647tbh
Under 70c is ideal for these xeons iirc
2 Likes
I don’t know how I’d get them below 70c on air cooling that is available. This setup is going into a 4U case and I’ll stack with fans.
How that I know this config works I’m going to do a 3u build as well.
If there is anything you would like to see run on it let me know.
I still got the supermicro board kicking around and I hate having a board without CPU’s to go with it.
If I have CPU’s then I need to get some memory.
If I have a fully populated board I should go ahead and put it into a case.
If I have a case I should just go ahead and add 24 4GB drives.
With all that spinning rust I’ll need some NVMe cache for it.
Yeah, that should do it.
1 Like
if everythings stable, it’s fine. Its just you might see slightly higher boosts if thermal and power conditions permit. will depend on workload too. not so much on the boosts w/avx512
1 Like
I got the CPUs
Ordered the R191-NA0
Ordered Samsung PC4-21300 2666MHz Registered
If it boots I will run it in for a week to see how reliable it is.
Will post back here with the results.
Little late to the party but I also just bought a 8124m CPU. I struggled in picking a motherboard because of the 205 tdp rated limit. I almost got the Asus WS C621E SAGE with plans on a bios mod to allow for the qs cpus but I wasn’t fully convinced.
I settled for getting an Asrock ep2c612 ws. I saw screenshots of the 8124m running on it so I went for it. Parts are still on the way but I will update if they are compatible or not.
This CPU seems like a really good deal for server old stock but it was a pain to find info online on what boards work so hopefully I can help add to the list of compatible ones for everyone else.
I would like to know how yours have been running and if you have suggestions on getting ram. Server ram is a little harder to figure out. Supposedly single rank ram should he faster but I see dual rank ram do better on Benchmarks. I would like to select what ever is the fastest for general work and gaming so I think getting unbuffered ecc would be best. I think registered ecc is the slowest of the styles so it’s the only one I will avoid but any input would be appreciated. I am not worried about losing work in progress and normal PC blue screens are not an issue.
I think the issue is it’s an off roadmap CPU that was never given to anyone just Amazon servers so boards that might be able to run it arent setup to, like they may not recognize it.
Can anyone with the Gigabyte 1U server variants do some power draw testing ? I am thinking about setting up a few of these with 128-256GB of ram in a single CPU configuration, with possibly extending that to a second CPU in the future.
I would love to know what the kWh draw is on at idle / 5-8 cpu load / peak.
Well I got it up and running with the asrock board ep2c621d12 ws and a single 8124m cpu. Noctua fan NH D9 DX is great with this 3647 socket
Ram has been finicky to recognize both of my udimm sticks. Both worked on their own but wouldn’t together. I know that’s a common thing, even among getting same model number ram (different chips and all), but these were bought at the same time and they dont play nice.
I am about to drop some moneybon two 8124m xeon chips and get the EP2C621D12 so i can add some GPUS i have laying around and mellanox 100Gb cards to create a nice Hyper-v server to play with and learn from. Trying to do failover clustering testing.
@Precision18FL how did the EP2C621D12 asrock work out
@Wes_Brown how did you fair with the PSU did you have better stability using a bigger PSU (you were using an 850w psu if i am not mistaken, what are you using now?)
So it just worked off the bat with the CPU and I liked that. Asrock is from Amazon and Amazon ordered these CPU’s custom so maybe that’s why.
It seems fast except I have ram issues. I’ll be honest it’s been a while since I built a PC. Last one was a dual 370 socket p3 which had it’s own issues as well lol. But I have a hard time getting my all my ram to run well at 2666 mhz. It either doesnt recognize the ram (maybe slot issues) or when it does it runs sluggish. I need to find better ram benchmark tests but I really cant seem to get big bandwidth gains when I go from 1 channel to dual to quad channel memory. I will post some benchmarks later but I was hoping to see more of an improvement. I get the best results when I run it at 2133 mhz for what ever reason.
My psu has wattage readings so I can record what it draws under load later.
Sad to report that HP, in their infinite wisdom, has chosen not to support the 8124M On the DL360 G10 
These CPUs will not work on that chassis, sadly.
So, I ended up building two servers around these chips and the asrock motherboard. Other than making sure the VRM’s are cooled if you are doing heavy AVX workloads.
1 Like
I’m late to the party but maybe these could be useul info for someone:
I confirm that Xeon 8124m (QS from Ebay) works with Asrock Rack EPC621D8A.
I am currently using this setup with Unraid. System booted without any issues, CPU perfectly recognized both by mobo and OS too. Right now it’s 2 weeks of continuous operation including heavy CPU load coming from various rendering software, and zero hiccups.
I am willingly to perform tests using my current setup, so feel free to contact me.
Huge thanks to @wendell making me aware of this “off-the-books” model, you made my workstation upgrade possible for such a low price!
Honestly I would love to see more content like this (“heads-up” on used and less publicly known enterprise gear) on the channel.
I’m new here, and sorry for bumping an old thread, but I just wanted to thank everyone who posted in here, I’ve been painstakingly trying to figure out my parts list for my next build, and I already have the CPUs but just couldn’t figure out which motherboard they would go with!
I had put an order in for a SM board from wiredzone and had to hastily request a cancellation (hopefully its approved)
Now I have to source an Asrock (I’m in Canada)
or a gigabyte barebones 
1 Like
This is such an interesing route for a workstation upgrade. Still rocking an x9 board with 2x e5-2680 v2’s.
On the ebay listings they mention the asrock boards but also the Gigabyte C621-WD12. Any thoughts on that? I’m a little hesitant to trust the ebay listing since they also mention the supermicro boards.
It seems a bit more difficult to source the asrock boards in Europe. The Gigabyte is readily available, but also a bit more geared to workstation applications. Better vrm cooling and more usb.
Any thoughts on that?
Cheers!
Karel.
1 Like
sounds like a win-win if its got better vm and more usb.