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YGPM

Wow, I'm shockingly well equipped to help. I run an HPC business in Ontario and was looking to start swapping out our ROME systems for EPYC 9000. I have 2x64 and 2x32 core variants and can kit them out as you described. YGPM

Well I have a pair of "Genoa 96 core monsters" and was coming here to check if this worked on them. No reports yet?

yeah, S8253 it doesn't boot noticibly faster, but the screen is on telling you what it is doing with a few seconds, whereas first boot with SMC H12 board takes many minutes to post a picture to screen.

Gotta love that 5 minutes of hoping it works when I click the power for the first time on an EPYC 7000 system. BTW, The tyan board posts in like 5 seconds instead of 5 minutes. it still takes forever to initialize on first post, but at least the display lights up and tells you what it is doing...

That is also correct by my understanding. The pcie 5 signal distance is rather poor and requires repeaters everywhere etc to work on pcie slots, so the difference between lm0 and lm1 is probably this peripheral infrastructure (the repeaters) and there is no impact on the cpu interconnect.

My personal SP3 systems are mostly watercooled, and I would certainly do the same with SP5, but I also need air cooled workstation-like solutions.

P.S. I would love to know any cooler options that might be quieter than Dynatron J12 3U. Something like Supermicro 4U or Noctua or something that could make for reasonable workstation usage with 280W (or more) processors...

Similar story on buying in north America. MZ73-LM1 is much cheaper but months away for lead time. I would rather it as I don't need PCIe 5, but I ordered some LM0 to get started with.

What awesome luck. I just got 4x 826 that I need rails for. YGPM

These work FYI: M393AAG40M32-CAE 128GB RDIMM 3200 4Rx4 (3DS 2H 8G x 4) x 36 Both supermicro and gigabyte boards. Not relevant to "cheap ram discussion", but just in terms of broad compatibility and ranks.

Also EATX is ambiguous. do you want full 12x13? SSI-EEB SSI-CEB

I don't know about smallest, but I'll throw this in for your consideration as a compact and well ventilated choice. https://www.amazon.com/Silverstone-RM42-502-rackmount-Compatibility-RM42-502-x/dp/B09227RQV2

yeah basically VRM is the limit on H11DSI & H12DSI.

oh I should try that. I always fired up edge and figured it was a firefox / chrome issue? yeah all ast2600 boards from supermicro do this for me.

YGPM

I have lots of hours of high duty cycle run time at ~3.4-3.5 GHz on a 32 core QS (-04) Actually It's now my smallest machine and I'm debating liquidating it, I should have bought a pair but I tiptoed in.

No, I contacted the seller, made them verify some things. The RAM and SSDs were stripped and he was unaware. Its just CPUs, boards, a mix of 4u and 2u coolers, and some used power supplies. I'm still speaking with him as I still have some interest, but I mostly wanted the RAM. He updated his ad...

Mirrormax that was going to be the next attempt, uefi update, but the only CPUs I had to do it with were in production use actively working, and water cooled. The headache of taking it apart etc... I have a bunch of other's that wouldnt work a single -04 Rome QS that wont boot unless you have...

I have a 16 core Gen 1 I'd like got for $100 with free shipping. I also have 8x8 GB DDR4 2400 Supermicro 4U active cooler.