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Hardwarehoard

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Buying your first used server doesn't need to be intimidating. Here's what matters.

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What the scores mean

Fit rates how well a listing suits your use case, you pick a lens (Homelab, NAS, or Balanced) and toggle what you care about (cores, RAM, storage, quiet, low power…). Value is that Fit per dollar, the bang for your buck. Deal compares the asking price to what that exact box typically sells for, so you can spot a bargain.

Picking your first server

Homelab / Proxmox: prioritize cores + RAM for virtual machines, and lean on the Quiet and Low-power factors if it lives at home. Start with the Homelab lens.

NAS / data hoarding: prioritize drive bays and storage; look for NVMe-ready and HBA IT Mode if you'll run ZFS/TrueNAS. Start with the NAS lens and watch the $/bay column.

Not sure yet: the Balanced lens plus the Under $300 chip is a safe, cheap way to get your feet wet.

Glossary

CPU generation
Roughly when the CPU was made. Older is cheaper but slower and less power-efficient. Xeon E5 v1/v2 (~2012, Sandy/Ivy Bridge) are the cheapest; Xeon Scalable (~2017+) are much faster.
Server generation
The chassis family and age (e.g. Dell G13, HP Gen9). Newer generations are generally quieter, more efficient, and take faster CPUs and RAM.
HBA IT Mode
A storage controller flashed to pass drives straight through to the OS. It's what ZFS / TrueNAS / Unraid want, with no hardware RAID in the way. Many servers ship a RAID controller; for software storage you want it in 'IT mode' (a.k.a. HBA / passthrough) so the OS sees each disk directly.
IOMMU
Hardware support for handing a device (like a GPU) directly to a virtual machine. Needed for Proxmox / ESXi GPU passthrough.
ECC
Error-correcting memory that detects and fixes bit errors. Standard on servers and important for NAS / ZFS data integrity.
NVMe-ready
The chassis can take fast NVMe SSDs (via a U.2 backplane), not just SATA / SAS drives.
Rack units
Height in a 19-inch rack: 1U is about 1.75 inches. A 2U server is twice as tall as a 1U.
Noise tier
How loud the server is at idle, from 1 (whisper-quiet, home-friendly) to 5 (datacenter screamer).
Idle power
Roughly how many watts the server draws doing nothing. Lower is cheaper to run 24/7 at home.
Single-socket capable
A 2-socket board that runs fine with just one CPU installed. Cheaper to buy, lower idle power.
Form factor
Physical shape: rack (mounts in a 19-inch rack), tower (sits on the floor like a PC), or blade.
AVX-512
An advanced CPU instruction set some software (and AI workloads) use; found on newer Xeon Scalable chips.

Go deeper

Ready for specifics? These in-depth guides go further:

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