How to Host a NeoTech Reborn Server (NeoForge 1.21.1 Setup Guide)

Start with at least 10GB of RAM dedicated to the modpack. NeoTech Reborn bundles 650+ mods — magic and tech progression, 1000+ mob additions, and epic structure generation — and that mod count alone pushes memory needs well past a typical kitchen-sink pack long before anyone starts building.

Import the official server pack directly through CoalHost's panel rather than assembling the mod list by hand. With this many mods layered together, getting even one dependency version wrong breaks the NeoForge mod-loading chain, and the real server pack already has every version pinned correctly.

Watch the console through the entire first boot. A pack this size takes real time to register 650+ mods' worth of blocks, items, and structures — that's normal — but it also means a single incompatible mod produces a wall of errors that's easy to miss if you close the console early.

Keep players out until the world fully generates and the server reaches a clean "Done" with no mod-loading errors. NeoTech Reborn's structure generation runs heavier chunk logic than vanilla, and players exploring during an incomplete first boot is a common cause of early corruption reports.

Take a backup before every mod or NeoForge update. With custom enchantments, new mobs, and structures all interdependent, an update that shifts even one mod's registry can invalidate items or structures already placed in the world — a backup is the only way back if that happens.