How much RAM does an Elysium Days server need?

We recommend 8 GB. With around 500 mods on Fabric 1.20.1, a lot of memory is spent before anyone joins, simply loading the content those mods register. Extra headroom matters most when players explore far apart and generate new chunks at the same time, so add RAM if your group roams widely rather than building together.

How many players suit one Elysium Days server?

The pack plays best with about six players on one server. That is where shared exploration still feels busy without every player pulling a separate region of new terrain into memory. Larger groups can work, but expect to pregenerate more of the world and give the server more RAM to keep ticks steady.

How do I update Elysium Days without losing my world?

Back up the whole server first, then read the changelog of the new build for mods that were removed or replaced. Install the update on a copy of the world and check that bases and inventories load intact. Only when that copy looks right should you update the live server, because missing mods delete their blocks on load.

Can I add or remove mods?

Yes, but treat the pack as a balanced set. Adding a small server-side tool such as Chunky is low risk. Removing a content mod is not: any block, item or entity it added is wiped from the save the next time the world loads. Players also need the matching mod list on their clients, so share every change with the group.

How does Elysium Days compare with Fabulously Optimized?

Fabulously Optimized focuses on performance and visual options and adds no new gameplay, so it stays very close to vanilla. Elysium Days also carries optimization mods, but its real purpose is content: new places to explore, more to fight and more to build with, roughly 500 mods in total. Pick Fabulously Optimized for a faster vanilla and Elysium Days for more game.

Does Elysium Days feel like a different game?

No, and that is the point of it. The pack is built to feel like Minecraft as it might have grown on its own, so the art style, survival loop and progression stay familiar. New content shows up gradually as you explore, which makes it easy for returning players to jump back in without a guide open beside them.

Minecraft modpack · Modrinth

Elysium Days Server Hosting

by Fyoncle

FabricMinecraft 1.20.1Java 17

How install works

One-click install from the Modpacks tab once your server is ready

Recommended RAM: 8 GB
Latest build: v8.0.0Jun 2026
Mod loader: Fabric1.20.1
Downloads: 416KModrinth

Elysium Days is a Fabric modpack for Minecraft 1.20.1, put together by Fyoncle, that starts from a simple question: what would the game feel like if Mojang had kept expanding the parts players already love? Instead of bolting on tech trees or a magic system with its own rules, it layers roughly 500 mods onto the familiar survival loop, so a returning player recognises everything and still finds something new behind every hill.

The hook is density without strangeness. Exploration, combat and building all get deeper, new places to find and new reasons to travel appear, and a heavy optimization layer sits underneath so the extra content does not drag the game down. The categories on its listing say it plainly: adventure, multiplayer and optimization. Version 8.0.0 is the current build, and the pack has a long release history behind it.

It suits groups who drifted away from vanilla because it felt thin, friends who want a shared world to explore together without looking up every item in a wiki, and anyone who likes the vanilla art direction but wants more of it. A small, steady crew is where it plays best on one server.

Hosting Elysium Days

RAM and what drives load

Around 500 mods is heavy territory, and we recommend 8 GB for this pack. Most of that memory goes to the registries and world generation that hundreds of content mods add on boot, so the server sits higher at idle than a vanilla world ever would. Load then climbs with spread: six players exploring in six directions generate far more fresh terrain than six players sharing one base. If ticks slow down, profile before you guess, with spark installed:

/spark profiler start
/spark profiler stop

World pregeneration and chunk loading

Fresh chunks are the expensive part on Elysium Days, because each one passes through every worldgen mod in the pack before it can be saved. Pregenerating a radius around spawn before the group logs in moves that cost to a quiet hour. On Fabric 1.20.1 Chunky does the job: add it to the server's mods folder, then run:

/chunky radius 3000
/chunky start

Keep the radius modest, since a 500-mod world grows large on disk quickly.

Java version and updating

Minecraft 1.20.1 runs on Java 17, which is the baseline for this server, and Java 21 starts it as well. Elysium Days ships large version jumps, and 8.0.0 is the current one. Before you update, take a full backup, read the changelog for removed mods, and test the new build on a copy of the world. A mod that disappears between versions can take its blocks and items with it, and those are gone from the save once the world loads without them.

Mods

Roughly 500 mods on Fabric

A vanilla-plus build that expands the base game instead of replacing it.

Version

Minecraft 1.20.1, build 8.0.0

The panel installs the current 8.0.0 release on the Fabric loader.

Performance

Optimization mods built in

An optimization layer ships inside the pack, so the extra content stays playable from day one.

How to install Elysium Days on your server

1
Order the server
The button on this page preselects the RAM this pack needs. It is online about a minute after checkout.
2
Open the Modpacks tab and search Elysium Days
Open the Modpacks tab in the panel, search for Elysium Days, pick the listing by Fyoncle and choose build 8.0.0 to install it in one click.
3
Press install and wait
The panel downloads the server pack, installs the loader and the right Java version, then restarts.
4
Join with the same build
Everyone installs the same pack build in their launcher, then connects to the address on the Overview tab.

Available builds

Build	Minecraft	Loader	Released	Installable
v8.0.0	1.20.1	Fabric	Jun 25, 2026	Installable
v7.0.0Beta	1.20.1	Fabric	Dec 17, 2024	Installable
v6.0.0Beta	1.20.1	Fabric	Oct 5, 2024	Installable
v5.3.0Beta	1.20.1	Fabric	Sep 1, 2024	Installable
v5.2.0Beta	1.20.1	Fabric	Aug 5, 2024	Installable