How Much RAM Does an After The Fallout Server Need?
After The Fallout is a nuclear-wasteland survival pack on Forge 1.20.1, and its memory needs track closely with how many players are scattered across radiation zones and mutant-infested ruins at once. See the full pack details on the After The Fallout pack page. It's a different survival flavor from Best Zombie Apocalypse - Ultra Realistic, which focuses on infected/zombie base survival rather than radiation and wasteland mutants, so don't size the two packs the same way. Finnish players: Minecraft-palvelin hosting is our native-language page. German players: Minecraft-Server mieten covers the same hosting auf Deutsch. Svenska spelare: Hyra Minecraft-server täcker samma hosting på svenska.
4 GB
Bare minimum for solo play or a duo exploring the wasteland. It's below the pack's own recommended floor, so expect tighter headroom once radiation zones and mutant-heavy areas load in — fine for testing, risky for anything you plan to keep running.
5 GB
The best starting point for most After The Fallout servers. This matches the modpack's own recommended RAM floor and gives Forge, the mutant AI, and the irradiated-biome generation enough breathing room for a small group without constant tuning.
7 GB
Safer for a mid-size active group exploring multiple wasteland regions at once. The extra headroom absorbs the chunk loading and entity load that comes with several players scattering across radiation zones and scavenging different ruins simultaneously.
10 GB
For 10+ players or a long-running world that's accumulated a lot of built-up base infrastructure and explored terrain. At this scale you're mostly paying for garbage-collection headroom and chunk cache, not raw mod weight.
Want a faster estimate?
Use CoalHost's RAM calculator, then start from the plan that matches your player count and expected world activity.
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