How Much RAM Does an Immersed With Shaders Server Need?
Immersed With Shaders (see the Immersed With Shaders pack page) is a shader-focused, FPS-boosting Fabric pack with a light QoL layer on top — lighter than a big content modpack, but shader rendering still needs real headroom beyond a vanilla server. Here's how much RAM to budget for depending on your player count. Finnish players: Minecraft-palvelin hosting is our native-language page. German players: Minecraft-Server mieten covers the same hosting auf Deutsch. Svenska spelare: Hyra Minecraft-server täcker samma hosting på svenska.
4 GB
Enough to boot Immersed With Shaders solo or with a friend or two, but shader rendering and resource pack loading leave little headroom — expect tight memory under any real load.
8 GB
The recommended floor for Immersed With Shaders on Fabric 1.21.1 — comfortable headroom for shader assets and the QoL layer with a small-to-medium group. The best starting point for most servers.
12 GB
Safer for a mid-size, actively-playing group, especially if players are exploring a lot of new terrain and loading shader-heavy chunks at the same time.
16 GB
Recommended for 10+ concurrent players or a long-running world with a large explored area, where chunk loading and shader rendering overhead add up.
Want a faster estimate?
Use CoalHost's RAM calculator, then start from the plan that matches your player count and expected world activity.
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