How to Fix Moon Sweepers Stuttering and Frame Drops: 2026 PC Optimization Guide

I have lost an entire weekend to Moon Sweepers, and I regret nothing. Well, almost nothing. Except the moment my 14-hour mega-base turned into a slideshow right as my crew of friends was celebrating our first fully automated capsule line.

If you’re here, you probably know exactly what I’m talking about. You’re vacuuming up lunar dust, the music is perfect, your conveyor belts are humming like a beautiful machine, and then BAM. A half-second freeze. Then another one. Then your FPS dives below 60 and your co-op buddy types “bro, are you lagging??” in chat.

Yes. Yes, I am. And so is half of Reddit.

I spent days digging through Steam forums, testing settings, and annoying my friends with “okay, restart the game again, I changed something.” This is everything that actually helped me. It’s long, it’s a little rant-y, and I hope it saves you the headache.

Why Is Moon Sweepers So Heavy on Performance?

DragDrop Games, a tiny two-person studio, built something special here. Up to 16 players in one lobby, a moon covered in volumetric dust, and automation lines that grow into beautiful, terrifying spaghetti. But all that charm comes at a price.

From what I’ve seen and tested, the lag comes from three places:

• DirectX 12 shader compilation: the game compiles shaders on the fly, which causes those nasty frame spikes.
• Volumetric dust: gorgeous, but it eats your VRAM for breakfast.
• Thousands of physical items on belts: every single capsule is tracked and rendered by your CPU.

So when your base gets big, you’re basically asking your PC to simulate a tiny space factory and render a dust storm at the same time. Honestly? I respect the ambition. I just wish it ran better.

Fix #1: Force DirectX 11 (The Game-Changer for Me)

If you only do ONE thing from this guide, make it this one. Seriously.

By default, Moon Sweepers runs on DirectX 12. In my experience, that’s what causes the dreaded stutter every time you enter a new sector or fire up a high-tier sweeper for the first time. People in the community report frame-time spikes of up to 250 ms. That’s not a stutter, that’s a full-on hiccup.

Switching to DX11 made my 1% lows way more stable. It wasn’t magic on every system, but on my mid-range rig the difference was night and day.

How to do it:

1. Close the game and open Steam.
2. Right-click Moon Sweepers in your Library and hit Properties.
3. On the General tab, find the Launch Options box.
4. Type -dx11 and close the window.
5. Launch the game and enjoy.

I honestly sat there for ten minutes just flying around new sectors, waiting for the freeze that never came. Beautiful.

Fix #2: The Graphics Settings That Quietly Betray You

Here’s the thing about the default presets: they’re not friendly. A few settings cost way more performance than they’re worth, and you can claw back a big chunk of FPS (people say up to 30%) without the game looking ugly.

A quick personal take on each:

Volumetric Dust: I was so reluctant to touch this because the dust looks incredible. But dropping from High to Medium honestly changed my life. I can barely tell the difference when I’m busy running between machines, and my GPU finally stopped sounding like a jet engine.

Shadows: Medium is the sweet spot for me. Once my base got big, High shadows were murdering my frame rate.

Motion Blur: Turn it off. I don’t care if you like it. Your eyes and your frame times will thank you.

Exclusive Fullscreen: I’d been playing borderless because alt-tabbing is convenient. Switching to exclusive fullscreen felt snappier right away, with less input lag and fewer random micro-stutters.

Fix #3: Your Belts Are Probably the Real Villain

This one took me a while to figure out, and I want to shout it from the rooftops: in the late game, your lag is probably not your graphics card’s fault.

I had a base with hundreds of loose capsules rolling across open conveyors, and my FPS tanked even though my GPU usage was low. That’s your CPU choking on tracking every single physical item. Every capsule is an entity the game has to simulate and render.

Here’s what helped me:

• Use covered conveyors. Mods like the LogisticsPlus framework (on Nexus Mods) add covered tubes. Items inside don’t get rendered or simulated individually. They just logically jump to the end. Swapping my long belts for covered ones removed hundreds of active entities, and my FPS shot up instantly.
• Don’t let belts back up. When an exit is blocked or a sorter is set up wrong, capsules pile up and the engine keeps calculating collisions on all of them. That’s a silent FPS killer.

A tip from a very painful lesson: if your frame rate drops only in one specific part of your base, go look at the belts there. Nine times out of ten there’s a clogged line.

Fix #4: Get Your GPU Control Panel Working For You

Your driver software can quietly sabotage you, or save you. Here’s what I changed.

If you’re on NVIDIA:

1. Open the NVIDIA Control Panel and go to Manage 3D Settings.
2. Find Moon Sweepers under Program Settings (or use Global).
3. Set Power Management Mode to Prefer Maximum Performance so your GPU doesn’t downclock during calm moments.
4. Set Low Latency Mode to Ultra. It won’t raise your max FPS, but it gets rid of that sluggish, rubber-band feeling.
5. Make sure Resizable BAR is enabled in your BIOS.

If you’re on AMD:

1. Open AMD Software: Adrenalin Edition and head to Gaming, then Moon Sweepers.
2. Turn on Smart Access Memory (SAM) if your hardware supports it. It’s basically free performance.
3. Enable Radeon Anti-Lag.
4. Turn Radeon Boost and Radeon Chill OFF. Boost drops your resolution during fast movement, which looks jarring on those wide lunar landscapes, and Chill can cause frame instability.

A friend of mine on AMD swore the Boost setting was ruining his experience, and turning it off fixed the weird flickering resolution shifts he kept complaining about.

Fix #5: Windows Is Sneaky (Timers and Page File)

If you’re getting hard, sudden freezes on a powerful PC, Windows itself might be the problem.

The Page File: This one is simple and safe. If your virtual memory is restricted, Windows has to scramble when your RAM fills up, and Moon Sweepers leans on it hard during big 16-player sessions.

1. Press Win + R, type sysdm.cpl, hit Enter.
2. Go to Advanced, then Settings under Performance.
3. Open the Advanced tab again and click Change under Virtual Memory.
4. Select your main SSD (usually C:) and tick System managed size.

Don’t set tiny manual limits. I made that mistake once and paid for it with random freezes.

Disabling HPET (optional, YMMV): Some players swear by disabling the High Precision Event Timer in Device Manager (System devices, right-click, Disable device). It helped a few folks fix stubborn micro-stutter, though honestly the results are hit-or-miss. If you try it, change one thing at a time so you know what worked, and re-enable it if nothing improves. I wouldn’t start here.

Fix #6: Verify Your Files and Think About Your Host

Moon Sweepers is made by a two-person team. They patch fast, which is awesome, but fast patches sometimes leave broken files behind.

Verify your install:

1. Right-click the game in Steam, then Properties.
2. Open Installed Files.
3. Click Verify integrity of game files.

Steam will redownload anything broken. It takes a couple of minutes, and it fixed some weird asset-loading hitches for me after a recent update.

And about co-op: this is the one nobody talks about enough. In multiplayer, the host decides everyone’s experience. If the host has a slow drive or shaky upload speed, the whole crew gets synchronized rubber-banding. We learned this the hard way when my buddy with a Wi-Fi connection hosted and the entire lobby felt like walking through honey.

For big bases, pick the player with:

• The fastest NVMe SSD
• The best wired internet connection
• A solid CPU, since it handles most of the simulation

Once we swapped hosts, the lag basically vanished for all of us.

Moon Sweepers Low FPS Fix: How to Stop Stuttering and Boost Performance

My Final Settings Cheat Sheet

Here’s the quick version if you just want to copy and go:

Final Thoughts From a Very Tired, Very Happy Sweeper

Look, I’m not going to pretend Moon Sweepers is perfectly optimized. It isn’t. A little DX12 polish and better handling of belt entities would go a long way, and I really hope the devs keep patching.

But I’ll say this too: I’ve rarely been this addicted to an indie game. There’s something deeply satisfying about watching a messy pile of dust become a clean, glowing, automated empire, especially with friends yelling in voice chat about whose fault the jam is (it’s always the sorter).

After these fixes, my base runs smooth, my crew stopped complaining about lag, and I got my weekends back. Okay, I lost them again, but this time to actual gameplay instead of troubleshooting.

So go try -dx11 first, tame that dust, and clear your belts. Then come back and tell me in the comments how much better it runs. And if you found a fix I missed, share it. We sweepers have to stick together.

Happy sweeping, and may your capsules never back up.

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