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Jacob Roach / Tech Reader
While there are plenty of tips and tricks for what to do within Minecraft, not many people talk about how to boost performance. Classic Minecraft Java Edition can get bogged down by shaders and modpacks that expand and update the game beyond its original scope. Fortunately, you can always just allocate more RAM to it so that performance doesn’t suffer too much — as long as you have enough RAM, that is.
Here’s how to allocate more RAM to Minecraft, regardless of how much you have in your system.
Note: Minecraft Bedrock Edition can take advantage of more RAM without you having to manually adjust anything. This tweak is for the Java Edition of Minecraft only.
Mojang
How to allocate more RAM to Minecraft
The Java version of Minecraft has (by modern standards) a relatively small quantity of allocated RAM, and without you giving it access to more through the launcher, it can’t go beyond that. That leads to poor performance or crashes when the memory runs out. Here’s how to allocate more.
Step 1: Open the Minecraft launcher and then select the Installations tab.
Step 2: Find the profile that you want to change memory allocation for, and select the three-dot menu icon.
Step 3: Select the More options button under the “Resolution” subheading.
Step 4: Scroll down to “JVM Arguments” and look for the “-Xmx2G” parameter.
Step 5: Select the text and use your keyboard to change “-Xmx2G” to “-Xmx8G”. That will allocate 8GB of RAM to the Java launcher, which for most installations should be enough. That said, you can theoretically change it to any quantity divisible by 2 that is under your total RAM quantity.
Step 6: When you’ve set it to the quantity you want, close down those options menus and run Minecraft again to see how it performs.
If you want to see how much memory you have left over, while playing, press and hold the F3 function key. It will display how much memory you have to spare and whether you might need to allocate more.
Matthew Smith / Tech Reader
How to allocate more RAM in the CurseForge launcher
If you’re using the CurseForge launcher, you can allocate more RAM in a similar but slightly different way.
Step 1: Open the CurseForge app, and select the Settings cog in the bottom-left corner.
Step 2: Under the “Game Specific” subheading, select Minecraft.
Step 3: Scroll down to find the Java Settings category. Use your mouse to adjust the slider bar to allocate more RAM to the game. Again, 8GB should be enough for more installations, but you can go more or less depending on your hardware and specific needs.
Problems allocating more RAM to Minecraft
- Can’t allocate more than 2GB: If you find that you can’t allocate more RAM than 2GB, you may need to update your Java client. Download the latest version of Java here. Then close and re-open the Minecraft launcher and try again.
- Minecraft crashes after updating RAM allocation: If you’re experiencing crashes or lagging during play, you may need to allocate more memory. Try increasing the count by another few gigabytes and try again. Alternatively, if you definitely have enough, try allocating less, as you may have gone too far and allocated memory that was needed elsewhere.
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