Help! My client is crashing whenever I try to start it up or connect to my server!

This commonly occurs when you do not have enough memory allocated to your game. Sufficient memory allocation is especially important when it comes to modded gameplay due to the resource demand they require.

Fortunately, most launchers only require a few steps to adjust this. So long as you have the memory space available on the computer you are using to play, you should be good to go once you've made the adjustment.

For modded gameplay, a minimum of 4GB/4096MB is recommended.
More recent versions of Minecraft may demand a bit more, so you might consider 6GB if you're trying a 1.13+ pack.

Vanilla gameplay, or gameplay with plugins, generally does not require more than 2GB of memory allocated to your client.

Please Note

CubedHost is not directly affiliated with any of these launchers in any way. This guide is here only to help you enjoy Minecraft and connect to your server.

Launchers can change at any time. We will do our best to keep this guide updated but please note that some directions may vary over time pending changes to the launchers. If you ever need help, please reach out to our team!

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So how do I allocate more memory to my launcher?

We've included directions for several launchers below and we'll continue to add new launchers upon request, so feel free to reach out to us if you get stuck or have concerns with any steps you see here.

Minecraft Launcher (Default/Vanilla)

  1. Open your Minecraft client (Java version).
  2. Select the Installations tab towards the top of the launcher.
  3. Hover over your desired profile/Minecraft version, then select the button with the three dots on the right.
  4. Select Edit from the drop-down menu. A modal will appear and More Options will be available in the bottom-left. Select this.
  5. In the "JVM arguments" field, change -Xmx1G  to -Xmx#G , replace # with the amount of RAM you'd like to allocate to Minecraft in GB (do not modify any other text).
  6. Select the green Save button and you're done!


Open your ATLauncher, select the Settings tab from the right-side menu pane, then select the Java/Minecraft tab from the top navigation bar.

You should now see drop-down menus available regarding memory.
Adjust the Maximum Memory/RAM drop-down selection to your desired memory amount (remember that at least 4096 MB is recommended).

Don't forget to select the Save  button once you're done!

Twitch Launcher (Curse/FTB Modpacks)

To adjust this setting in the Twitch Launcher, access your settings by selecting the small down arrow in the top-right, then select the Settings  option with the gear icon.
Next, select the Minecraft tab on the Settings page and locate the Allocated Memory slider under Java Settings. Adjust the slider to your desired memory amount (remember we recommend at least 4096MB).

Technic Launcher

Open your Technic Launcher, select the Launcher Settings using the little gear found in the top-right, then select the Java Settings  tab from the navigation bar in the Java Settings window.

You should now see a drop-down menu available to adjust Memory.
Adjust this to your desired memory amount (remember that at least 4GB is recommended).

Your changes are saved automatically, so feel free to close the Launcher Options window and get to mining!

If you're only able to allocate a maximum of 1GB of memory, that most likely means that the 32bit version of Java is installed on your system which limits the maximum amount of memory that can be allocated. To fix this, all you need to do is uninstall Java and install Java 8 64bit onto your system, then restart your computer.

Legacy FeedTheBeast (FTB) Launcher

Select Options, then move the RAM Maximum (MB)  slider around to your desired memory amount (remember, we suggest at least 4096MB).

Void Launcher

Select the gear in the top-right corner, change the Max:  under the Minecraft: Options  to increase the amount of RAM (remember, we suggest at least 4096MB).

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