Terraria — How to Fix "Out of memory with mods"
Out of memory with mods in Terraria: the fix path, and when it is grounds for a refund.
Last updated 2026-09-25 · evergreen reference
If Terraria is failing with "Out of memory with mods", this page tells you which fixes are worth your time and when you should stop troubleshooting and go to the store instead. The causes are specific, so the fixes are too.
What the error looks like
Confirm you are dealing with the same failure.
Recognising "Out of memory with mods"
tModLoader runs out of memory — often the mod list loads fine but the game crashes or freezes when you create or enter a world.
Why it happens
The cause determines the fix.
Cause 1
Loading the mod list and loading a world are separate memory events. A large pack can finish initialising and still fail when world generation and world data need more.
Cause 2
Running a 32-bit build, which is limited to roughly 3.5 GB of RAM.
Cause 3
Large content mods — bosses, biomes, music packs, high-resolution texture replacements, many animated sprites, or complex world generation — consuming far more than quality-of-life mods.
Fixes, in the order that works
Cheapest and most reversible first.
Use the official 64-bit tModLoader
The current default on Steam is 64-bit. If you have an old manual installation you may still be on 32-bit, which caps you near 3.5 GB. Reinstall from Steam.
Turn on the mod memory display
tModLoader can show per-mod memory consumption in the Mods menu. Enable it in settings, restart, and target the actual large contributors instead of disabling things at random.
Use the half-split method
Disable half your mods and try loading the world. If it works, the problem is in the disabled half; if not, it is in the enabled half. Repeat. This is much faster than one mod at a time in a large pack.
Split into separate mod profiles
Keep one profile per playthrough — a Calamity profile, a Thorium profile, a building profile and a lightweight multiplayer profile — instead of enabling everything at once.
Close memory-heavy applications
Browsers with many tabs, image editors, virtual machines and game launchers all reduce what tModLoader can use. Also keep required library mods even if they look small, since other mods depend on them.
How to confirm it is fixed
One successful launch is not proof.
Retest properly
Create a new world as well as loading the existing one. World generation is the memory-heavy step, so passing a load but failing a generate means you are still right at the limit.
When to ask for a refund instead
Troubleshooting has a deadline.
Know the window
Steam refunds within 14 days of purchase and under 2 hours of playtime, and documented technical faults are sometimes accepted past that. Microsoft Store and Epic follow similar rules with store-specific exception paths.
Evidence changes outcomes
Attach crash logs, a DxDiag and the steps you already tried. A denied refund can sometimes be overturned when you can show the game is genuinely unplayable rather than simply disliked.
Bans are not refundable
If the failure follows an anti-cheat ban or a modified online client, no store will refund it. That is a separate category from a game that will not run.
Related pages
This is an independent player reference and is not official documentation for Terraria. GameFixPro does not host or link to copyrighted assets. Modding guidance is for single-player use only — never use mods in online multiplayer. Verify current requirements, prices and policies with the publisher before acting.