Can my old PC run a server?

Pick the closest answers. Nothing is uploaded, and the result is intentionally cautious rather than pretending to be a benchmark.

Computer

Tell us what the old PC has.

CPU classPick the closest class; add the exact model below if you know it

Exact CPU model Optional, but useful context—not a benchmark

Installed RAM

Main storage

Server goals

Set a realistic workload for this machine.

Expected players

Server type

Mods or plugins

World size

Minecraft version

How often will it run?

Network + power

Check whether friends can join reliably and what 24/7 use may cost.

Internet uploadRun a speed test from home if unsure

Power-cost context Optional local electricity rate

Electricity rate In your local currency per kWh

CAUTIOUS PLANNING ESTIMATE

Probably workable

Start conservatively and measure before raising players or distances.

Rough player range: 1–8
Server software: Paper
Start with: 2–4 GB RAM
System reserve: At least 3 GB
View / simulation: 10 / 8
World pregeneration: Optional
Estimate confidence: Medium-low — one key detail is unknown
Estimated energy: 3–6 kWh / month

Main limitations to verify

CPU class is unknown; Minecraft depends heavily on single-thread speed.
Current releases and add-ons can be more demanding than older, already-tuned worlds.

This is a planning range, not a guarantee. Single-thread CPU speed, cooling, world activity, software versions, and exact add-ons all matter. Recommended server RAM never exceeds installed memory after a conservative system reserve.Use these details in Server Builder →How this estimate works