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Comment by mort96

5 hours ago

I bought a bundle with 512GB of RAM and an older 24-core EPYC (7F72) + supermicro motherboard on ebay a bit over a year ago, it was really an amazing deal and has made for a truly nice NAS. If you're okay with stuff that's old enough that you can buy decommissioned server stuff, you can get really high-quality gear at surprisingly low prices.

Companies decommission hardware on a schedule after all, not when it stops working.

EDIT: Though looking for similar deals now, I can only find ones up to 128GB RAM and they're near twice the price I paid. I got 7F72 + motherboard + 512GB DDR4 for $1488 (uh, I swear that's what I paid, $1488.03. Didn't notice the 1488 before.) The closest I can find now is 7F72 + motherboard + 128GB DDR4 for over $2500. That's awful

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mort96

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MostlyStable  4 hours ago

I've heard it claimed that the era of being able to do this (buy slightly old used server hardware cheap on ebay) is coming to an end because, in the quest for ever more efficiency, the latest server hardware is no longer compatible with off-the-shelf power supplies etc. (there was more but that's the part that I remember) and therefore won't have any value on the second hand market.

I hope it was wrong, but it seems at least plausible to me. I'm sure that probably fixes could be made for all these issues, but the reason the current paradigm works is that, other than the motherboard and CPU, everything else you need is standard, consumer grade equipment which is therefore cheap. If you need to start buying custom (new) power supplies etc. to go along, then the price may not make as much sense anymore.

  • evanjrowley  1 hour ago

    The power supply incompatibility came to fruition a long time ago. Buying used Supermicro ATX motherboards to build into servers stopped being a thing for me about 1 decade ago. But used servers and desktops, even with their non-standard parts, have continued to deliver high value for me even today.

  • fc417fc802  39 minutes ago

    When boxes get decommissioned it's generally the entire thing. So you can pick up used power supplies as well. Or just buy new because even if it isn't ATX it's still a widely produced item that's used across multiple product lines.

    The troublesome hardware is the stuff with custom backplanes and multiple daughterboards each hosting a node. Also AMD CPUs that lock themselves to a single motherboard.

MayeulC  4 hours ago

I'm curious, what is the powe draw for such a system? Of course, it heavily depends on the disks, but does it idle under 200W?

I personally feel like I will downscale my homelab hardware to reduce its power draw. My HW is rather old (and leagues below yours), more recent HW tends to be more efficient, but I have no idea how well these high end server boards can lower their idle power consumption?

epistasis  5 hours ago

RAM! (And NAND SSDs too now, probably...)

When I was looking in October, I hadn't bought hardware for the better part of a decade, and I saw all these older posts on forums for DDR4 at $1/GB, but the lowest I could find was at least $2/GB used. These days? HAH!

If I had a decent sales channel I might be speculating on DDR4/DDR5 RAM and holding it because I expect prices to climb even higher in the coming months.

  • fc417fc802  1 hour ago

    I don't remember DDR4 ever hitting $1/GB. Was I not shopping in the right places? IIRC DDR3 settled in at $1/GB quite a long time ago and recycled datacenter DDR4 was maybe ballpark $2.50/GB at some point.