this post was submitted on 19 Dec 2024
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I'm currently running a Xeon E3-1231v3. It's getting long in the tooth, supports only 32GB RAM, and has only 16 PCIe lanes. I've been butting up against the platform limitations for a couple of years now, and I'm ready to upgrade. I've been running this system for ~10yrs now.

I'm hoping to future proof the next system to also last 8-10 years (where reasonable, considering advancements in tech and improvements in efficiency), but I'm hitting a wall finding CPU candidates.

In a perfect world, I'd like an Intel with iGPU for QuickSync (HWaccel for Frigate/Immich/Jellyfin), AND I would like the 40+ PCIe lanes that the Intel Xeon Scalable CPUs offer.

With only my minimum required PCIe devices I've surpassed the 20 lanes available on desktop CPU's with an iGPU:

  • Dual m.2 for Proxmox ZFS mirror (guest storage) - in addition to boot drive (8 lanes)
  • LSI HBA (8 lanes)
  • Dual SFP+ NIC (8 lanes)

Future proofing:

High priority

  • Dedicated GPU (16 lanes)

Low priority

  • Additional dual m.2 expansion (8 lanes)
  • USB expansions for simplified device passthrough (Coral TPU, Zigbee/Zwave for Home Aassistant, etc) (4 lanes per card) - this assumes the motherboard comes with at least 4-ports
  • Coral TPU PCIe (4 lanes?)

Is there anything that fulfills both requirements? Am I being unreasonable or overthinking it? Is there a solution that adds GPU hardware acceleration to the Xeon Silver line without significantly increasing power draw?

Thanks!

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[–] thumdinger 2 points 1 day ago (3 children)

I think this is where I'm headed. Is there anything to consider with Threadripper vs Epyc? I'm seeing lots of CPU/MOBO/RAM combo's on ebay for 2nd gen Epyc's. Many posts on reddit confirming the legitimacy of particular sellers, plus paypal buy protections have me tempted.

[–] Cort 2 points 1 day ago (2 children)

I think the 3rd Gen epic and threadripper were the first ones with pcie gen4. You might want to look at something a little newer if you're wanting to get 10 years out of it. I'm personally looking at trx50 and a 7960x, but still saving up for that $1300 processor

[–] thumdinger 1 points 1 day ago (1 children)

The options I’m looking at have PCIe 4 and seem to be gen 2? Epyc 7282 or 7302.

[–] Cort 2 points 1 day ago

I didn't realize that, and it looks like you're right, that could be a good deal