Celerium
ModpackThe 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
Game Versions
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Contained Mods (25)
Cloth Config API (Fabric/Forge/NeoForge)
Config Screen API for Minecraft
ImmediatelyFast
Speed up immediate mode rendering in Minecraft
Clumps
Clumps XP orbs together to reduce lag
Entity Culling Fabric/Forge
Using async path-tracing to hide Tiles/Entities that are not visible
Fabric API
Core API library for the Fabric toolchain
YetAnotherConfigLib
A builder-based configuration library for Minecraft.
Sodium
The fastest and most compatible rendering optimization mod for Minecraft. Now available for both NeoForge and Fabric!
FerriteCore
Memory usage optimizations
Lithium (Fabric/NeoForge)
An optimization mod for Minecraft which improves server performance significantly.
Mod Menu
Adds a mod menu to view the list of mods you have installed.
Fabric Language Kotlin
Fabric language module for Kotlin
Alternate Current
An efficient and non-locational redstone dust implementation
BetterF3
A mod that provides a highly customizable, more human-readable Debug HUD.
Text Placeholder API
Placeholder and Text manipulation library for your Minecraft mods.
Dynamic FPS
Improve performance when Minecraft is in the background
MoreCulling
A mod that changes how multiple types of culling are handled in order to improve performance
Debugify
Fixes Minecraft bugs found on the bug tracker
Your Options Shall Be Respected (YOSBR)
Your options shall be respected.
Better Mount HUD
Improves the ingame HUD while riding a mount
FastQuit
Lets you return to the Title Screen early while your world is still saving in the background!
Krypton
A mod to optimize the Minecraft networking stack
Shulker Box Tooltip [Fabric/Forge/NeoForge]
What's in my shulker box?
FPS - Display
A Fabric mod that shows your ingame FPS on screen
Moonrise
Optimisation mod for the dedicated/integrated server.
Block Entity Render Distance
Limits the rendering distance of Block Entity