Buying-Guide

Every homelab ends up with SSDs doing several different jobs at once: booting the hypervisor, holding VM disks, backing a ZFS special vdev or SLOG, maybe just serving as bulk fast storage for a database. Most buying advice treats this as one decision, “get an SSD, more capacity is better,” and stops there. That’s fine for a boot drive. It’s a real mistake for anything doing sustained writes, and it can quietly cost you data integrity on a ZFS log device. The differences between consumer and enterprise flash are specific and they map directly onto which job a drive should actually do. ...

Most homelab buying guides start with the case or the drives, but the CPU and motherboard decide almost everything downstream of them. PCIe lane count sets how many cards you can run at once. ECC support decides whether a bit flip in RAM silently corrupts your ZFS pool or gets caught and corrected. IOMMU group layout decides whether GPU or HBA passthrough to a VM is a ten-minute config change or a wall you can’t get past no matter what you try. None of that shows up on a spec sheet the way clock speed and core count do, which is exactly why it gets skipped over until someone hits it the hard way. ...

RAM is one of the easiest specs to either badly underbuy or badly overbuy in a homelab, because the honest answer to “how much do I need” is “it depends on what you’re actually running,” and most buying guides dodge that and just tell you to get 32GB or 64GB and move on. That’s not wrong exactly, but it skips the reasoning that lets you size correctly for your own setup instead of someone else’s. Here’s how to actually work it out, plus the ECC question that comes up right behind it. ...

“Do I need a GPU for this” comes up constantly in homelab planning, usually attached to one of two very different goals: hardware-accelerated transcoding for Plex or Jellyfin, or running local AI workloads like Ollama or Stable Diffusion. Those two goals point at completely different hardware, and buying for one when you actually need the other is one of the more common expensive mistakes in this hobby. Here’s how to figure out which category you’re actually in before you spend anything. ...

Ask “what should I run Proxmox on” in any homelab community and you’ll get two camps talking past each other, one pushing a mini PC (an Intel NUC-style box, a Beelink, a Minisforum), the other pushing a custom build in a real case with expansion slots. Both are right, for different homelabs. The question isn’t which is objectively better, it’s which set of tradeoffs actually matches what you’re going to do with the box. ...