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Celerium

Modpack

The modpack made for old, OLD devices.

Type

Modpack

Modrinth Downloads

120

Modrinth ID

cCCgmsrj

Last Updated

Apr 12, 2026

Description

Meet Celerium!

The Optimization modpack that revolves around Celeron CPUs and iGPUs or just weak CPUs in general!

Goal

The main objective of this modpack is to make things easy for people that don't have very good PCs, mainly, Pentium/Celeron/Laptop users. Because I believe that anyone should enjoy Minecraft with less problems! This is mainly why this modpack exists.

How is this modpack good?

Celerium contains carefully picked mods and configurations to ensure you can enjoy a smoother Minecraft experience in your computer regardless of its specifications! Every mod that is in this pack are almost guaranteed to have little to no problems in Minecraft! As I said, this modpack contains configurations that come as defaults to you and thanks to YOSBR, these changes persist through versions, which means it just works out of the box! (You can always alter the settings in case you're unsatisfied).

Some important stuff

This modpack doesn't control how often the mods that it includes update, so I'll only update a certain mod in the pack if that update comes to my attention.
I will only update the modpack to newer versions once all the mods that it includes are updated to said version.
Although the modpack supports 1.21.4-1.21.8 + 1.21.10-1.21.11, main development and testing is done on 1.21.10, the version that the modpack originally released at.
For guides and support about the modpack, refer to the Documentation.

Can I add my own mods?

Of course you can! After all, this IS Minecraft: Java Edition, as long as the mod is compatible with the version of the game you got for the modpack and is made for Fabric, you can add it without any problems. But I advise you to be careful, some mods might not work well with others if they touch the same system, I am not responsible for any incompatibilities from mods you added to the modpack.

Is it safe?

Of course it is! It's even open-source, you can find the link to the source and the documentation on right, pretty useful stuff, right?

Ways of contact:

Discord: @psystock
E-mail: [email protected]

Mods included:

Alternate Current by Space Walker
BetterF3 by TreyRuffy
Better Mount HUD by Lortseam (available on 1.1.0+)
Block Entity Render Distance by LoLip_p
Cloth Config API by shedaniel
Clumps by jareddlll08
Debugify by isxander
Distant Horizons (only available in 1.0, though.) by jeseibel
Dynamic FPS by LostLuma
Entity Culling by tr7zw
Fabric API and Fabric Language Kotlin by modmuss50
FastQuit by contaria
FerriteCore by malte0811
FPS - Display by Grayray75
ImmediatelyFast by RaphiMC
Krypton by astei
Lithium by jellysquid3
Mod Menu by Prospector
Moonrise by jpenilla
MoreCulling by FX
Not Enough Crashes by natanfudge (ADDED IN 1.4.0 BUT QUICKLY REMOVED IN 1.4.1 DUE TO INCOMPATIBILITES)
Sodium by CaffeineMC (available in versions 1.2.1+)
Text Placeholder API by Patbox
Shulker Box Tooltip by MisterPeModder
YetAnotherConfigLib (YACL) by isxander, the same creator of Debugify!
Your Options Shall Be Respected (YOSBR) by shedaniel (available on 1.3.0+)
If you want to know exactly what each mod does, check the documentation

Compatibility

Mod Loaders

Fabric

Game Versions

1.21.4 1.21.5 1.21.6 1.21.7 1.21.8 1.21.10 1.21.11

Similar Modpacks

Contained Mods (25)

Cloth Config API (Fabric/Forge/NeoForge)

Cloth Config API (Fabric/Forge/NeoForge)

Config Screen API for Minecraft

Mod 115,491,714
ImmediatelyFast

ImmediatelyFast

Speed up immediate mode rendering in Minecraft

Mod 85,738,921
Clumps

Clumps

Clumps XP orbs together to reduce lag

Mod 26,149,560
Entity Culling Fabric/Forge

Entity Culling Fabric/Forge

Using async path-tracing to hide Tiles/Entities that are not visible

Mod 106,353,832
Fabric API

Fabric API

Core API library for the Fabric toolchain

Mod 356,109,708
YetAnotherConfigLib

YetAnotherConfigLib

A builder-based configuration library for Minecraft.

Mod 172,319,449
Sodium

Sodium

The fastest and most compatible rendering optimization mod for Minecraft. Now available for both NeoForge and Fabric!

Mod 259,740,403
FerriteCore

FerriteCore

Memory usage optimizations

Mod 104,959,088
Lithium (Fabric/NeoForge)

Lithium (Fabric/NeoForge)

An optimization mod for Minecraft which improves server performance significantly.

Mod 88,621,514
Mod Menu

Mod Menu

Adds a mod menu to view the list of mods you have installed.

Mod 97,946,175
Fabric Language Kotlin

Fabric Language Kotlin

Fabric language module for Kotlin

Mod 76,684,260
Alternate Current

Alternate Current

An efficient and non-locational redstone dust implementation

Mod 7,804,604
BetterF3

BetterF3

A mod that provides a highly customizable, more human-readable Debug HUD.

Mod 25,053,945
Text Placeholder API

Text Placeholder API

Placeholder and Text manipulation library for your Minecraft mods.

Mod 37,256,561
Dynamic FPS

Dynamic FPS

Improve performance when Minecraft is in the background

Mod 46,504,931
MoreCulling

MoreCulling

A mod that changes how multiple types of culling are handled in order to improve performance

Mod 45,257,157
Debugify

Debugify

Fixes Minecraft bugs found on the bug tracker

Mod 25,088,199
Your Options Shall Be Respected (YOSBR)

Your Options Shall Be Respected (YOSBR)

Your options shall be respected.

Mod 19,339,565
Better Mount HUD

Better Mount HUD

Improves the ingame HUD while riding a mount

Mod 16,151,153
FastQuit

FastQuit

Lets you return to the Title Screen early while your world is still saving in the background!

Mod 16,226,993
Krypton

Krypton

A mod to optimize the Minecraft networking stack

Mod 30,128,219
Shulker Box Tooltip [Fabric/Forge/NeoForge]

Shulker Box Tooltip [Fabric/Forge/NeoForge]

What's in my shulker box?

Mod 25,450,572
FPS - Display

FPS - Display

A Fabric mod that shows your ingame FPS on screen

Mod 2,832,010
Moonrise

Moonrise

Optimisation mod for the dedicated/integrated server.

Mod 167,793
Block Entity Render Distance

Block Entity Render Distance

Limits the rendering distance of Block Entity

Mod 19,487

External Resources