There is nothing more frustrating than firing up your favorite game, hitting a buttery 120 FPS for the first hour, and then watching it slowly crumble into a stuttering mess after hour four. I have been there more times than I can count, and in almost every case the culprit was the same: a memory leak quietly eating away at my available RAM until Windows had nowhere to put new data.
If you are trying to figure out how to stop a memory leak from causing stutter in long sessions, you are in the right place. This guide walks through what memory leaks actually are, how they turn smooth gameplay into a choppy nightmare over time, and the exact steps I use to fix and prevent them on my own machines.
I have pulled together fixes that real players on Reddit have verified across games like Escape from Tarkov, Last Epoch, Warzone, and Path of Exile 2, combined with the Windows-level tweaks that most guides completely skip. By the end of this article, you will have a clear playbook for diagnosing, stopping, and preventing memory leak stutter, even during marathon sessions.
Table of Contents
The 5-Minute Quick Fix Checklist
If your game is stuttering right now and you suspect a memory leak, start here. These five steps take about five minutes and resolve the problem in the majority of cases I have seen.
- Close every browser tab and background launcher you are not actively using. Chrome alone can eat 3 to 5 GB with a dozen tabs open, and that is RAM your game desperately needs.
- Open Task Manager (Ctrl + Shift + Esc), switch to the Details tab, and sort by Memory. Look for any process climbing steadily without stopping.
- Run ISLC (Intelligent Standby List Cleaner) if you have it installed. It forces Windows to release standby memory that games cannot reclaim on their own.
- Disable Memory Integrity (VBS) in Windows Security if you are on Windows 11. It can cost you 5 to 10 percent of your frame rate and worsen memory pressure over time.
- If all else fails, fully restart the PC, not just the game. Many memory leaks persist in Windows standby memory even after the offending program closes.
A full restart is not the fix most players want to hear, but I want to be honest with you: if the leak is severe, restarting is the only guaranteed way to get a clean slate. The sections below show you how to avoid reaching that point in the first place.
What Is a Memory Leak?
A memory leak happens when a program asks Windows for RAM, uses it, and then never gives it back. Over time, that unreleased memory piles up, and the available pool your system can hand out shrinks smaller and smaller.
Think of it like a bucket with a small hole. Water (RAM allocations) keeps getting poured in, but some of it quietly leaks out into a drain it can never escape. Eventually the bucket fills up, and new requests have nowhere to go.
Memory leaks can happen in any application, but they are especially common in modern games built on engines like Unity and Unreal. They also show up frequently in browsers, streaming software like OBS, and background launchers from Epic, EA, and Rockstar.
The two flavors you will encounter are active leaks, where a running program keeps hogging more RAM, and standby leaks, where Windows holds onto memory the program already released but refuses to give back. Both produce the same stutter symptoms, and both need different fixes.
How Memory Leaks Cause Stutter in Long Sessions
Memory leaks do not usually cause problems in the first 30 minutes of play. The stutter creeps in slowly, which is why so many players blame their GPU, drivers, or internet connection before realizing memory is the issue.
Here is exactly what happens inside your PC as a leak progresses through a long session.
The Cause-and-Effect Chain
First, your game allocates RAM for textures, shaders, audio, and game logic. Some of that memory never gets freed. After an hour or two, Windows starts running low on free RAM and begins moving data to the paging file on your SSD or hard drive.
Paging is dramatically slower than RAM. We are talking nanoseconds versus milliseconds. Every time the game needs data that Windows paged out, you get a frame-time spike, and that spike shows up on screen as a stutter.
Frame Time Versus FPS
This is a concept most troubleshooting guides skip, and it is the key to understanding memory leak stutter. Your FPS counter might still read 90 or 120, but the game feels awful.
That is because FPS is an average, while frame time measures how long each individual frame takes to render. A memory leak causes one frame to suddenly take 40 milliseconds instead of 8, even if the next ten frames are fast. Your eyes perceive that single long frame as a stutter, but the average FPS barely moves.
This is why checking an FPS counter will mislead you. If you want to actually diagnose memory leak stutter, you need to watch a frame-time graph using MSI Afterburner, CapFrameX, or the in-game overlay in titles that support it.
Why It Gets Worse the Longer You Play
Memory leaks are cumulative. Every minute you play, more memory is allocated and not returned. The longer the session, the smaller your free RAM pool, and the more aggressive Windows gets about paging data out.
This is why players on the Escape from Tarkov subreddit call the game “practically unplayable” after four hours, and why OBS streamers report their broadcasts turning into a slideshow during six or seven hour sessions. The leak compounds over time, and the only thing that resets it is a reboot.
Signs You Have a Memory Leak Causing Stutter
Before you start changing settings, you need to confirm a memory leak is actually your problem. Here are the symptoms I look for when diagnosing my own machines and helping friends.
- RAM usage climbs steadily during play and never drops back down, even in menus or paused screens.
- Stutter gets worse the longer you play, but is barely noticeable in the first hour.
- Your FPS counter stays high, around 90 or above, but the game still feels choppy.
- Frame drops spike during combat, explosions, or fast travel, when the game suddenly needs more memory.
- The game eventually crashes with an “out of memory” or “fatal error” message after extended play.
- Closing the game does not free the RAM, and Task Manager shows high memory usage even after exit.
- Other apps slow down too, including Discord, Chrome, or Windows itself, during long sessions.
If four or more of those match what you are seeing, you almost certainly have a memory leak. The next section walks through every fix that actually works.
How to Stop a Memory Leak from Causing Stutter in Long Sessions
This is the step-by-step process I use to stop memory leaks from wrecking long gaming sessions. Work through these fixes in order, because each one builds on the last.
Step 1: Identify the Leaking Process
Open Task Manager with Ctrl + Shift + Esc and click the Performance tab. Note your total memory usage at idle. Then launch your game and check again every 30 minutes.
If memory usage climbs by more than 1 GB per hour and never drops when you alt-tab or pause, you have confirmed a leak. Switch to the Details tab, sort by Memory, and identify which specific process is growing. Sometimes it is the game itself, but often it is a background service like EasyAntiCheat, a launcher, or even Steam’s web helper.
Resource Monitor (resmon) gives you an even deeper view. Open the Memory tab and look at the Standby column. If Standby is huge and Free is near zero, Windows is hoarding memory the game needs.
Step 2: Clear Standby Memory with ISLC
ISLC, short for Intelligent Standby List Cleaner, is a free tool that forces Windows to release standby memory. It is the single most recommended fix on Reddit for memory leak stutter, and for good reason: it works.
Download ISLC, set the “Free memory lower than” value to around 1024 MB, and the “Standby list lower than” value to 2048 MB. Click Start and leave it running in the background while you play. Every time standby memory crosses your threshold, ISLC wipes it back to free memory your game can actually use.
This is not a cure for the underlying leak, but it stops the symptom cold. Many players report being able to extend sessions from two hours to six or more just by keeping ISLC running.
Step 3: Disable Memory Integrity and VBS
Windows 11 ships with Virtualization-Based Security and Memory Integrity enabled by default. These features protect against malware, but they also reserve a chunk of your RAM and CPU for security isolation, and they make memory leaks worse.
To disable Memory Integrity, open Windows Security, click Device Security, then Core Isolation details, and toggle Memory Integrity off. Restart your PC.
I have seen this single change recover 5 to 10 percent of frame rate in CPU-heavy games like Escape from Tarkov and Cyberpunk 2077, and it noticeably delays the onset of memory leak stutter in long sessions. The security tradeoff is real, so read up on it before deciding, but for a dedicated gaming PC it is one of the most impactful tweaks available.
Step 4: Disable Fast Startup
Fast Startup sounds helpful, but it causes problems with memory. When Fast Startup is on, Windows never fully shuts down, it hibernates the kernel instead. That means memory leaks from your previous session can carry over into the next boot.
To disable it, press Win + R, type control, and hit Enter. Go to Power Options, click Choose what the power buttons do, click Change settings that are currently unavailable, and uncheck Turn on fast startup. Save changes.
After this, every shutdown is a real shutdown, and every boot starts with genuinely clean memory. This one fix eliminates a surprising number of “my game stutters the moment I launch it” complaints.
Step 5: Kill Background Apps That Steal Memory
Every background app contributes to memory pressure. The biggest offenders I see are browser tabs (especially with YouTube or Twitch open), Discord overlay, NVIDIA GeForce Experience overlay, Xbox Game Bar, and launcher auto-starts from Epic, EA, Rockstar, and Ubisoft.
Open Task Manager Startup tab and disable anything you do not need at boot. Before launching a game, close Chrome entirely if you can. Even a handful of Twitch streams open in tabs can eat 4 to 6 GB of RAM, which is half the budget on a 16 GB system.
If you stream or record with OBS, be aware that OBS itself can develop memory leaks during long sessions, as documented by multiple users on the OBS subreddit. Restarting OBS every two to three hours is a known workaround.
Step 6: Expand and Clear Your Shader Cache
Shader compilation stutter is a different problem from memory leak stutter, but they often stack. Modern games compile shaders on the fly the first time you see a new effect or area, and that compilation process both causes hitches and consumes memory.
For NVIDIA users, open NVIDIA Control Panel, go to Manage 3D Settings, find Shader Cache Size, and set it to 10 GB or Unlimited. For AMD users, the equivalent setting lives in Adrenalin under Graphics, Advanced.
If you are on a low-RAM system, consider using DDU (Display Driver Uninstaller) to fully wipe your GPU drivers and reinstall clean. Corrupted shader caches are a sneaky source of persistent stutter that no amount of in-game tweaking will fix.
Step 7: Adjust Your Windows Paging File
When RAM fills up, Windows pages data to your SSD. If your paging file is too small or on a slow drive, that paging process causes massive stutter. Setting a fixed, generously sized paging file on your fastest SSD can soften the blow of a memory leak.
Press Win + R, type sysdm.cpl, go to Advanced, Performance Settings, Advanced again, and Virtual Memory Change. Uncheck Automatically manage, select your fastest SSD, and set a Custom size of around 16384 MB initial and 32768 MB maximum for a system with 16 GB RAM.
This will not stop the leak, but it makes the symptoms much more tolerable. Pages complete faster, and stutters become smaller spikes instead of full freezes.
Step 8: Disable Multi-Plane Overlay (MPO)
Multi-Plane Overlay is a Windows feature meant to reduce latency for full-screen apps, but it has a long history of causing stutter and memory issues with NVIDIA drivers. Disabling it is a known fix on both the NVIDIA and Microsoft support forums.
To disable MPO, you need to add a registry key. Open Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm, create a new DWORD (32-bit) value named OverlayTestMode, and set its value to 5. Restart your PC.
This is an advanced tweak, so back up your registry first. Many players on Reddit credit MPO disabling with completely eliminating stutter in games that had plagued them for months.
Step 9: Check Your Thermals
Memory leak stutter and thermal throttling can look identical from the player’s perspective. Before you blame the game, check your CPU and GPU temperatures with HWMonitor or MSI Afterburner.
If your CPU is hitting 90C or higher, or your GPU is throttling at 83C and above, you have a cooling problem on top of, or instead of, a memory problem. Clean your fans, reapply thermal paste if needed, and verify that stutter disappears before chasing memory leaks further.
Step 10: Update or Roll Back Drivers
Buggy GPU drivers are a frequent cause of memory leaks, and Windows Update sometimes silently replaces your driver with an older, broken version. Check your current driver version against the latest release on NVIDIA, AMD, or Intel’s website.
If you recently updated and started seeing stutter, roll back to the previous version using DDU for a clean install. If you are months behind, update to the latest Studio or Game Ready driver and test again.
Game-Specific Memory Leak Fixes
Some games are notorious for memory leaks, and the community has developed fixes specific to each one. Here are the most common offenders I see discussed on Reddit and what actually helps.
Escape from Tarkov
Tarkov runs on Unity and has a long, well-documented history of memory leaks. The single most effective fix reported by players is keeping ISLC running with a low threshold. Disabling the in-game voice chat overlay, lowering texture quality one notch, and avoiding Scav runs longer than two hours also help. Battlestate Games periodically patches leaks, so always run the latest version.
Last Epoch
Last Epoch players on Reddit frequently report “permanent” memory leaks that persist even after restarting the game. The fix that works for most is fully restarting the PC, not just the game, and verifying game files through Steam to catch corrupted assets that may be triggering excessive memory allocation.
Call of Duty: Warzone
Warzone is a notorious RAM hog, and the Ricochet anti-cheat has been linked to memory leaks by multiple community reports. Lowering the VRAM Scale in graphics settings, disabling On-Demand Texture Streaming, and closing the Battle.net launcher after the game launches are the most commonly cited fixes.
Path of Exile 2
Path of Exile 2 has documented stutter that players link to memory leaks, especially in long mapping sessions. The community fix is to use the standalone client instead of Steam (Steam’s overlay adds memory overhead), disable the in-game microtransaction texture preloading, and restart the client every two to three hours during extended play.
Cyberpunk 2077
Cyberpunk’s memory usage spikes heavily in dense areas like Night City’s city center. Lowering crowd density, disabling Screen Space Reflections Quality, and enabling Pipelight fix workarounds for browsers running alongside the game are the most effective community fixes.
How to Prevent Memory Leaks Before They Start
Fixing a leak mid-session is stressful. Preventing one is much easier. Here are the habits and settings I rely on to keep long sessions smooth.
Keep Your System Clean at Boot
Disable every unnecessary startup program in Task Manager. The fewer apps that launch with Windows, the more RAM your game starts with. I personally keep my startup list to my audio driver, mouse software, and nothing else.
Reboot Before Every Long Session
This sounds obvious, but I cannot count how many players I have helped who were trying to game after an uptime of 9 days. Windows accumulates standby memory and orphaned allocations the longer it runs. A quick reboot before you sit down to play wipes the slate clean.
Upgrade to 32 GB If You Can
If you are on 8 GB, memory leaks will ruin your experience no matter what you do. 16 GB is the minimum I recommend for modern gaming, and 32 GB gives you enough headroom that most leaks take twice as long to become noticeable. RAM is relatively affordable and is the single biggest upgrade for stutter-prone systems.
Keep Windows and Drivers Updated
Microsoft patches memory management issues regularly, and GPU driver updates often include game-specific leak fixes. Set Windows Update to active hours that avoid your gaming time, and check for GPU driver updates monthly.
Avoid Mod Overload
Mods are a frequent source of memory leaks, especially in Bethesda titles, Cities: Skylines, and Sims 4. If you run dozens of mods, use a mod manager that can detect memory-hungry addons, and disable any mod you suspect is leaking. The Nexus community forums are a good resource for identifying known problem mods.
Tools for Monitoring and Managing Memory
You do not need expensive software to diagnose memory leaks. Here are the free tools I use regularly and what each one is best for.
Task Manager (built into Windows) is your first stop. Sort the Processes tab by Memory and watch for any process that climbs steadily. The Performance tab gives you a quick visual of total RAM usage.
Resource Monitor (type resmon in the Start menu) shows you the Standby memory that Task Manager hides. The Memory tab breaks down exactly how Windows is using every megabyte, including the standby pool that games cannot reclaim on their own.
ISLC (Intelligent Standby List Cleaner) is a free utility that automatically purges standby memory when it exceeds a threshold you set. It is the single most recommended tool on Reddit for memory leak stutter, and I run it during every long session.
MSI Afterburner with RivaTuner overlays a frame-time graph, GPU usage, and CPU usage on top of your game. Watching the frame-time line is the most reliable way to spot memory leak stutter before your FPS counter catches it.
HWMonitor tracks temperatures over time, which helps you rule out thermal throttling as the cause of your stutter.
When to Restart vs. When to Troubleshoot
This decision comes up constantly, and the answer depends on how bad the stutter is and how much time you have.
Restart the PC if you are more than four hours into a session, stutter is severe, and ISLC is not helping anymore. A reboot clears standby memory and resets Windows memory management. It is the only guaranteed fix.
Troubleshoot first if the stutter is mild, you are under two hours in, or you have not yet tried closing background apps, clearing standby with ISLC, or checking Task Manager. Spend 10 minutes on the 5-Minute Checklist before giving up your session.
Do a full driver reinstall with DDU if stutter persists across reboots and multiple games. At that point you likely have a driver-level leak that needs a clean slate.
FAQs
Is there a way to fix memory leaks?
Yes. You can fix most memory leak stutter by clearing standby memory with ISLC, disabling Memory Integrity and Fast Startup, closing background apps, expanding your shader cache, and keeping your GPU drivers updated. If the leak is severe, a full PC reboot is the only guaranteed fix, because it clears both active and standby memory Windows cannot release on its own.
How to stop constant stuttering?
Constant stuttering is usually caused by memory pressure, thermal throttling, or driver problems. Start by closing every background app you do not need, clearing standby memory with ISLC, disabling Memory Integrity, lowering shader cache settings, and updating your GPU drivers. If stutter persists, check your CPU and GPU temperatures with HWMonitor to rule out thermal throttling.
Is a memory leak permanent?
No. A memory leak is not permanent. It only lasts as long as the leaking program is running or until Windows reclaims the memory. A full PC reboot clears all leaked memory, including standby memory that closing the program alone does not release. The underlying code bug causing the leak may persist across sessions until the developer patches it.
Is 88% memory usage bad?
It depends on context. At idle, 88 percent memory usage suggests a background process is leaking memory or you have too many startup programs running. During gaming on a 16 GB system, 88 percent is normal and not a problem on its own. The red flag is when usage climbs steadily past 90 percent and never drops, which indicates an active leak that will eventually cause stutter.
Do memory leaks cause permanent damage?
No. Memory leaks do not damage your hardware. They only consume RAM that should have been released back to Windows. Once you close the leaking program or reboot your PC, all the leaked memory is recovered. The only risk is crashes and lost progress during gameplay, not damage to your components.
Can bad RAM cause stuttering in games?
Yes. Physically faulty RAM, mismatched RAM speeds, or running in single-channel instead of dual-channel mode can all cause stutter. If you have ruled out software memory leaks and stutter persists across every game, run Windows Memory Diagnostic or MemTest86 to check your RAM sticks for errors. Bad RAM usually produces crashes and blue screens alongside stutter.
What are the signs of a memory leak?
The most common signs of a memory leak are RAM usage that climbs steadily during play and never drops, stutter that gets worse the longer you play, FPS that stays high while the game still feels choppy, frame drops during combat or fast travel, eventual game crashes with out-of-memory errors, and high memory usage in Task Manager even after closing the game.
Do memory leaks cause lag?
Yes. Memory leaks cause lag and stutter by forcing Windows to move game data from fast RAM to the much slower paging file on your storage drive. Every time the game needs paged data back, you get a frame-time spike that feels like lag, input delay, or a micro-stutter, even when your average FPS counter looks fine.
Conclusion
Memory leak stutter does not have to ruin your long gaming sessions. The combination of ISLC for standby memory, disabling Memory Integrity and Fast Startup, killing background apps, and rebooting before every marathon session will eliminate the problem for the vast majority of players.
If you take one thing away from this guide on how to stop a memory leak from causing stutter in long sessions, let it be this: watch your frame-time graph, not your FPS counter. Frame time tells the truth, and once you can see the spikes, the rest of these fixes become much easier to apply.
Start with the 5-Minute Quick Fix Checklist, work through the full troubleshooting steps if you need to, and build prevention habits into your routine. Smooth, stutter-free gaming through hour six and beyond is absolutely achievable, even on a modest 16 GB system, once you understand how memory leaks actually work and how to fight back.