FTB Skies2026-06-18 · 4 min read

How Much RAM Does an FTB Skies Server Need?

FTB Skies is lighter than most modpacks of similar mod count because skyblock maps keep fewer chunks loaded at once. 6 GB is the comfortable starting point and handles most groups well.

6 GB

2–8 players

Recommended starting point. Skyblock's compact world means less chunk loading pressure. Handles normal group play well through most of the tech progression.

8 GB

6–14 players

Better for active mid-to-late game with heavy automation, lots of machines running and multiple players building simultaneously. Removes most memory pressure.

10 GB

10–20 players

Large community FTB Skies server with high simultaneous player count and mature automation setups. Handles complex late-game configurations comfortably.

12 GB

16–30 players

Very active community server with many players and extensive cross-island automation systems all running at once. Maximum headroom for the heaviest setups.

FAQ

Why does a skyblock pack need less RAM than a normal modpack?+
In a skyblock world, players are concentrated on compact islands rather than exploring a large open world. Fewer chunks are loaded at any time, so the server keeps less world state in memory compared to an exploration-based pack.
What is the minimum RAM for an FTB Skies server?+
6 GB. This is a comfortable starting point, not a painful minimum. FTB Skies runs well at 6 GB for most groups through normal play.
Does automation still affect RAM usage in a skyblock pack?+
Yes. Machines, ME networks and Create contraptions that are running in loaded chunks still consume memory. The advantage of skyblock is that fewer chunks are loaded overall, not that automation is free.
How does FTB Skies compare to FTB Direwolf20 for RAM requirements?+
They are similar — both are NeoForge 1.20.1 packs of comparable mod count. FTB Skies can be slightly lighter in practice due to the skyblock world format reducing chunk load, but the difference is not dramatic.

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CoalHost runs FTB Skies with NeoForge and Java 17 pre-configured — no manual setup required.

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