// modpack server guide
Timeless and Classics Zero server hosting & setup guide
A Timeless and Classics Zero server needs Java 17 and about 2–3.5 GB of RAM for up to 15 players.
[TaCZ] mod with optimization mods
Summary from Timeless and Classics Zero Unofficial Modpack on Modrinth.
Timeless and Classics Zero Unofficial Modpack is a Forge modpack for Minecraft 1.20.1 with 5 mods. We'd pick our Standard plan (4 GB) for it.
Quick facts
| Loader | Forge |
|---|---|
| Minecraft versions | 1.20.1 |
| Java needed | Java 17 for Minecraft 1.20.1 Java version chart. |
| Mods | 5 modsCounted from the pack's file list on Modrinth. None are marked client-only. |
| RAM | About 2 GB for 1–3 playersBy player count. |
| Downloads | 158,773 on Modrinth |
| Last updated | January 15, 2025 (version 1.0.1) |
| First published | December 31, 2024 on Modrinth |
| Server support | Required: the pack has mods that must run on the server. |
| Server pack | Not published separatelyHow to build the server. |
| Modrinth tags | combat, challenging, technology |
Timeless and Classics Zero server files
No. Timeless and Classics Zero has no separate server pack on Modrinth, so the server is built from the .mrpack: the Forge server for Minecraft 1.20.1, plus the pack's overrides folder and the server-side mods its modrinth.index.json lists. A modpack installer does this for you; our guide shows how to make a server for a modpack with no server pack.
How much RAM does a Timeless and Classics Zero server need?
| Players online | RAM | DSN plan |
|---|---|---|
| 1–3 players | About 2 GB | Standard (4 GB) |
| 4–8 players | About 2–2.5 GB | Standard (4 GB) |
| 9–15 players | About 2–3.5 GB | Standard (4 GB) |
Estimated from 5 mods on the server with our RAM calculator, not measured: low end if players stay together, high end if they spread out.
Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx3500M on 4 GB. Forge 1.20.1 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.
Timeless and Classics Zero server requirements
| Java | Java 17 |
|---|---|
| Loader | Forge for Minecraft 1.20.1 |
| CPU | Fast single-core speed (one main thread). |
| RAM | About 2–3.5 GB for 1–15 players (table above) |
| Disk | The server files, a growing world and backups |
| Network | TCP port 25565 open to players |
Recommended plan
Our pick for Timeless and Classics Zero
Standard
4 GB RAM · planned launch price $16/month
At about 5 Forge mods this is a light pack, so 4 GB of RAM covers it for a small group.
Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Standard servers open.
More than 15 players, or lots exploring at once? Go up to Premium (8 GB). Not sure? Email hello@dsnservers.com.
Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.
How to make a Timeless and Classics Zero server on your own PC
What's specific to Timeless and Classics Zero, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.
- Install Java 17.
Check with
java -version. Java version chart. - Get the server files.
Build them from the .mrpack, as in server files above.
- Start it and accept the EULA.
Run the start script in the server files, or the
run.sh/run.batthe Forge 1.20.1 installer writes, then seteula=trueineula.txtif you accept Mojang's EULA (EULA step). - Set the RAM with
-Xmx, sized from the table above. - Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).
Or run Timeless and Classics Zero on DSN
Once we relaunch (join the launch list), on DSN you'd install Timeless and Classics Zero from the panel's Modrinth modpack installer (version 1.0.1), pick Java 17 on the Startup tab and accept the EULA in the console. No port forwarding.
How to play Timeless and Classics Zero with friends
Each player installs Timeless and Classics Zero version 1.0.1 with the Modrinth App or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.
Different versions of Timeless and Classics Zero on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.
Lag and performance on Timeless and Classics Zero
Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once Timeless and Classics Zero has enough (tick lag guide). For Timeless and Classics Zero:
- Measure first: spark's
/spark tpsand profiler work on 1.20.1 and name the mod or machine using the tick time. - Distances:
view-distance=8and a lowersimulation-distanceinserver.properties. - Pre-generate: Chunky for 1.20.1,
/chunky radius 3000then/chunky start, before people explore.
Common Timeless and Classics Zero crashes
What a Forge 1.20.1 server running Timeless and Classics Zero hits most. For any other error, paste the log into the free crash log analyzer.
- Wrong Java version. Timeless and Classics Zero on Minecraft 1.20.1 needs Java 17. Started on Java 8, it stops with
UnsupportedClassVersionError: ... class file version 61.0, this version of the Java Runtime only recognizes class file versions up to 52.0. Java version fix. - Out of memory. Timeless and Classics Zero (5 mods on the server) needs about 2 GB for 1–3 players;
java.lang.OutOfMemoryErrormeans it ran out. Out-of-memory fix. - Client-only mod on the server. The Timeless and Classics Zero pack file marks none of its mods client-only, so this usually means one was copied over from a player's mods folder. Check a mods list with the client-or-server-side checker. Client-only mod fix.
- After adding or updating a mod. Mods you add to Timeless and Classics Zero by hand usually crash it with a missing dependency or a mixin conflict.
- Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.
Updates and support
Before moving Timeless and Classics Zero past version 1.0.1, back up the world: see updating a modpack server without losing your world.
Bugs in Timeless and Classics Zero itself go to its authors: wiki. Server problems on DSN: hello@dsnservers.com or Discord.
Packs like Timeless and Classics Zero
More: all modpack guides and how to make a modded server.
Run Timeless and Classics Zero on DSN when we relaunch.
Our pick, Standard: 4 GB, planned at $16/month.
DSN Servers isn't affiliated with Timeless and Classics Zero Unofficial Modpack or Modrinth. The pack's name, icon, summary and stats come from Modrinth's public API (checked October 4, 2026).