How To Increase Your FPS In Minecraft 1.21.5! (2025)

If you’re tired of lag, frame drops, and stuttering in Minecraft, you’ve come to the right place! In this guide, I’ll show you how to increase your FPS in Minecraft 1.21.5 using the best settings, performance mods, and optimizations.

No matter if you have a low-end PC or a high-end gaming rig, these methods will boost your FPS and give you the smoothest gameplay possible.

• The download section is at the bottom, so keep reading to find the best tools for increasing FPS!

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Why Does Minecraft Lag?

Before we jump into the solutions, it’s important to understand why Minecraft might be running slow. Here are the most common reasons for low FPS:

• High Render Distance – Minecraft loads too many chunks at once.
• Unoptimized Graphics Settings – Certain settings like Smooth Lighting and Fancy Graphics slow down performance.
• Too Many Entities – Too many mobs, items, and particles can cause lag.
• Mods & Shaders – Some mods and shaders are too demanding for certain PCs.
• Outdated Graphics Drivers – Keeping your drivers up to date is crucial for performance.

Now, let’s go over the best ways to fix these issues and increase FPS!

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Step 1: Adjust Your Minecraft Video Settings

Go to: Options > Video Settings and use the following optimized settings for maximum FPS:

• Graphics: Fast
• Render Distance: 8-12 Chunks
• Smooth Lighting: OFF
• VSync: OFF
• Bobbing: OFF
• Clouds: OFF
• Particles: Minimal
• Entity Shadows: OFF
• Max Framerate: Unlimited

Why does this help? Lowering settings reduces GPU usage, allowing Minecraft to run much faster.

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Step 2: Install OptiFine for FPS Boost

One of the best ways to improve FPS is by installing OptiFine. This mod:

• Optimizes Minecraft’s graphics settings
• Adds FPS-boosting features
• Allows you to use performance-friendly shaders

Learn how to install OptiFine in this guide: How to Install OptiFine in Minecraft

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Step 3: Allocate More RAM to Minecraft

By default, Minecraft doesn’t use much RAM, which can cause lag. Here’s how to increase RAM allocation:

1. Open Minecraft Launcher
2. Click on Installations
3. Select your Minecraft version and click Edit
4. Click More Options
5. Find JVM Arguments and look for -Xmx2G (this means Minecraft is using 2GB of RAM)
6. Change it to -Xmx4G or -Xmx6G (if you have more RAM available)
7. Click Save

Why does this help? Allocating more RAM prevents stuttering and crashes, especially when using mods.

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Step 4: Install Performance Mods

Mods can help boost FPS by optimizing the way Minecraft loads chunks, renders graphics, and processes entities.

Best Performance Mods for Minecraft 1.21.5:

• Sodium – A replacement for OptiFine that improves FPS by up to 200%.
• Lithium – Optimizes game physics and mob AI for better performance.
• Phosphor – Improves lighting engine for faster chunk loading.
• FerriteCore – Reduces memory usage and speeds up loading times.

Download these mods on MinecraftSketchBros.eu

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Step 5: Use an FPS-Boosting Texture Pack

Default Minecraft textures aren’t optimized for performance. Using a low-resolution texture pack can greatly increase FPS.

Best Texture Packs for FPS Boost:

• Faithful 32x – Keeps Minecraft looking nice while increasing FPS.
• Bare Bones – A super minimal texture pack that removes extra details for better performance.
• Default+ – An optimized version of the default Minecraft textures.

Check out the best FPS texture packs: Top 5 High FPS Texture Packs

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Step 6: Update Your Graphics Drivers

Outdated drivers can hurt performance in Minecraft. Make sure to update your GPU drivers for the best FPS:

• NVIDIA: Download the latest drivers
• AMD: Get updated drivers
• Intel: Find the newest drivers

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Step 7: Disable Unnecessary Background Apps

Programs running in the background can use up CPU and RAM, slowing down Minecraft.

How to Close Background Apps on Windows:

1. Press Ctrl + Shift + Esc to open Task Manager
2. Click on the Processes tab
3. Close apps you don’t need, such as web browsers, Discord, and Spotify

Why does this help? More free memory means better game performance.

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Step 8: Optimize Your PC for Gaming

For an extra FPS boost, make sure your PC is set to high-performance mode:

1. Go to Windows Settings > System > Power & Sleep
2. Click Additional Power Settings
3. Select High Performance

This ensures your PC runs at full power while playing Minecraft.

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Final Thoughts – How to Increase FPS in Minecraft 1.21.5

If you want to fix lag, boost FPS, and enjoy smoother gameplay, follow these steps:

• Adjust Minecraft video settings for maximum performance
• Install OptiFine to optimize graphics
• Allocate more RAM to Minecraft
• Use performance mods like Sodium & Lithium
• Try an FPS-boosting texture pack
• Update your graphics drivers for better performance
• Close background apps to free up system resources
• Enable high-performance mode on your PC

By using these FPS-boosting tricks, you’ll make Minecraft run faster and smoother, no matter what kind of PC you have.

Want more Minecraft tutorials? Check out these guides:

• How to Install OptiFine in Minecraft
• Best FPS Boosting Mods for Minecraft
• How to Install Shaders Without Losing FPS

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Downloads

• OptiFine – Click here
• Sodium Mod – Click here

For more Minecraft performance tips, visit Minecraft Sketch Bros!