old and optimized

Name: old and optimized
Price: 8 EUR
Author: vingaming1113

Optimises minecraft to run on older computers.

by vingaming1113

328 Downloads

0 Followers

fabricMC 1.21.5lightweight

Rent old and optimized Server

About this Modpack

this modpack aims to make minecraft run as fast as possible on low end/old systems. It should only be used on older pcs.

it's recommended to choose the 1.16.5 version, as it runs better and has more mods.

mods included (1.16.5)

Better Beds [1.1.0] by Motschen, TeamMidnightDust
Dynamic FPS [3.9.4] by juliand665, LostLuma
Enhanced Block Entities [0.4] by FoundationGames
EntityCulling-Fabric [1.5.2] by tr7zw
FPS Reducer [1.24-mc1.16.5] by bre2el
Fabric API [0.42.0+1.16] by FabricMC
FerriteCore [2.1.1] by malte0811
Krypton [0.1.2] by tuxed
LazyDFU [0.1.2] by tuxed
Let Me Despawn [1.3.2c] by frikinjay
Lithium [0.6.6] by JellySquid
Memory Leak Fix [1.1.5] by FX - PR0CESS
ModernFix [5.18.0+mc1.16.5] by embeddedt
Phosphor [0.8.0] by JellySquid, PhiPro
Sodium [0.2.0+build.4] by JellySquid
retiNO [1.0.1] by juliand665

mods included (1.21.4)

Almanac [1.4.4] by frikinjay
Better Beds [1.4.1] by Motschen, TeamMidnightDust
Dynamic FPS [3.9.4] by juliand665, LostLuma
Enhanced Block Entities [0.11.3+1.21.4] by FoundationGames
EntityCulling [1.7.4] by tr7zw
FPS Reducer [1.21.3-2.11] by bre2el
Fabric API [0.119.2+1.21.4] by FabricMC
FerriteCore [7.1.1] by malte0811
Krypton [0.2.8] by tuxed
Let Me Despawn [1.5.0] by frikinjay
Lithium [0.15.3+mc1.21.4] by JellySquid, 2No2Name
ModernFix [5.20.3+mc1.21.4] by embeddedt
Sodium [0.6.13+mc1.21.4] by JellySquid (jellysquid3)

mods included (1.21.5)

Almanac [1.4.5] by frikinjay
Dynamic FPS [3.9.4] by juliand665, LostLuma
EntityCulling [1.7.4] by tr7zw
FPS Reducer [1.21.5-2.12] by bre2el
Fabric API [0.124.2+1.21.5] by FabricMC
FerriteCore [8.0.0] by malte0811
Krypton [0.2.9] by tuxed
Let Me Despawn [1.5.1] by frikinjay
Lithium [0.16.2+mc1.21.5] by JellySquid, 2No2Name
Sodium [0.6.13+mc1.21.5] by JellySquid (jellysquid3)

how do I install?

to install this modpack (or any modpack on modrinth), you'll need

a launcher which can install .mrpack files (most modern launchers)
that's basically it

here is the full image tutorial (for prism launcher/multimc)

guide

step 1

step 2
and then search for the modpack, and click download!

download prism launcher

Available Versions

old and optimized for 1.21.5release

MC 1.21.5fabric130 downloads

May 20, 2025

old and optimized for 1.21.4release

MC 1.21.4fabric66 downloads

May 20, 2025

old and optimized for 1.16.5release

MC 1.16.5fabric132 downloads

May 20, 2025

How to Set Up a old and optimized Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for old and optimized). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "old and optimized" and click "Install". The fabric loader and Minecraft 1.21.5 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

old and optimized server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a old and optimized server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to old and optimized without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.5). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

old and optimized server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.