How should BIS knows where this comes from, if you use a ton of MODs? Do you have the same issue on an regular Server without mods? If not, the problem comes from one of the mods.

I should add that a friend also confirmed with a 7800x3d on 23h2 that he has no problems. It is clearly not a mod issue if friends are on the same server as me playing with the same mods that it is not a mod issue and a windows build issue. If it is the case, seeing as it is the next major build of windows releasing in the next few weeks, it should probably get addressed.

Okay after a month I have been doing test. I am almost certain it is an arma reforger issue on 24h2 with x3d cpu's.

Friend with the exact same hardware has had no issues on 23h2.
I installed linux and proton runs it smoother than windows. I played for hours without a single stutter or hitch.
I had a crash to desktop when the hitch lasted a minute!!!! The error code on my board was A9 which is apparently a RAM issue. My guess is it is to do with windows/ arma is struggling to work out what to do with memory with these x3d chips.
No other games have an issue!!! I can't stress it enough, I am certain there are no hardware issues otherwise this would have persisted when I tried linux.
I will put a report into the discord as well and hopefully one of the devs can flag it

Geez,
Does reviewed mean that it has been passed on or the case is closed?
Thanks

I can also supply images of cpu utilisation on linux with no spikes over 100 percent usage if that furthers my case

The 1- 10 - sec hitches I experience happen all the way from 175fps down to 60, seems like the problem doesn't occur as quickly on lower frame rates, as in it takes longer for the hitches to start.

In T184946#2676648, @Geez wrote:

Hello TPepperoni666.
Can you please try to uninstall all mods and try on a vanilla server and let us know if you still have problems?

@TPepperoni666 can you please let us know?

Hey I am here to report the same issue, unfortunately.

9800X3D
RTX 3090
32 GB DDR5
Windows 11 Pro 24H2

When my play session reaches ~2 hours (conflict, vanilla, 128 person servers), I start to experience spikes of 100% CPU utilization every 1 minute or so, leading to stutters that can last up to 5 seconds.

It makes the game unplayable :(

Same issue:

9800x3D (default clock speed / voltage)
RTX 4080S
64GB DDR5 @ 6000Mhz
Windows 11 Pro 24H2
OS Build 26100.2894
Windows Feature Experience Pack 1000.26100.36.0
Samsung 990 PRO 1TB (OS)
Samsung 990 PRO 2TB (Game installed on this drive)

CPU typically averages between 15-30% utilization. Overall system temps are fine - CPU, GPU, SSDs all stay at normal levels. Memory, network, IO seem to be basically flat the entire time, without spikes.

I don't use mods and I play exclusively on vanilla servers. The ones I frequent typically average 20-30 server fps. I have a 144Hz limit on my framerate (using Arma Reforger gfx settings). My Monitor is 1440p @ 240Hz, and my GPU can push well above 200fps if I remove the cap.

A couple of hours in, I get major hitches due to CPU spikes from the ArmaReforger process (watched Process Monitor and Process Explorer extensively - there were no IO or network spikes, only CPU for what it's worth).

Usually they start small but get increasingly more severe and last longer and longer until what feels like a hard lock occurs (it's possible that I'm not waiting long enough for it to recover). I can hear audio chunks slowly working their way through the buffer, but after >1m the game doesn't recover so I hard reset. It seems to happen more on Everon than on Arland. Lots of times when I whip the mouse around suddenly, it will hitch pretty hard for a second.

Same issue:

5800X3D (undervolted, but stable in all other games)
RTX 4070 Ti Super
32GB DDR4 @ 3200Mhz
Windows 11 24H2 (Build 26100.3037)
970 EVO Plus 2TB SSD

Game runs at a stable framerate regardless of gettings, temps are fine. Once a hitch occurs it drops my GPU Clock to 0 until the hitch is over. Also freezes my entire system and rarely freezes it to the point where I have to kill the power and reboot from there.
Happens on both vanilla and modded. Noticed it happens A LOT MORE on high ping servers (maybe the game trying to catch up after a ping spike).

Same issue.

9800x3d
RTX 4080
64 GB DDR5@6000Mhz
Windows 11 Pro 24H2
Samsung 990 Pro 2 TB SSD

Same symptoms, game runs perfectly fine at 120-140 FPS, then a hitch/freeze happens and CPU spikes very high (and GPU load and power draw drop to extremely low). All drivers, BIOS, Windows are up to date. Fully DDU cleaned my PC twice. Game files verified. Changing settings to lowest possible makes 0 difference in the freezes. All other software closed. No issues running other high demand games, and the CPU, GPU, RAM, and SSD passed stresstests from 3DMark, FurMark, CrystalDiskMark, and Cinebench with 0 issues or errors. Temps never go over low 60s.

Happens in both vanilla servers and modded. Notably doesn't happen playing a private solo GameMaster session.

9800x3d undervolted
RTX 3080TI
64 GB DDR5 6000Mhz
Windows 11 Pro 24H2

Same thing and it only happens in this game. My gpu is being utilized at its fullest just fine, ram is a steady 16gb with no hitching, but anytime there’s a hitch I see it under the cpu performance tab, with longer freezes it showing it reach 100%.

Glad to see I'm not alone now and there are plenty of reports. The common things I see are 24H2 windows and X3d Cpu's with Arma being the thing that is spiking the CPU. I even bought a 9800X3D in hopes that would fix it but no bueno. Hopefully we don't have to wait too long for some kind of a response that they are indeed looking into it or better yet have identified the issue. Makes it pretty unplayable tbh. I haven't booted it up since mid Jan and even then that was only for an hour until it was unplayable. Fingers crossed fellas!

Did you ever end up trying to go back to windows 11 23H2? I was thinking about it but didn’t know if that was a fix.

No I didn't. I have just stuck with 24H2 and waiting on a patch. Limit your fps to about 60 and it should minimize how long it takes for the stutters to occur and how severe they are. The still get bad, just not as quick.
I would partition a small amount on your driver and install 23H2 or Bazzite/ linux to tie you over until there is a patch. Save wiping your system and starting fresh

In T184946#2770987, @Leeroy1021 wrote:

Did you ever end up trying to go back to windows 11 23H2? I was thinking about it but didn’t know if that was a fix.

I had another drive with a 23H2 Windows install on it and booted into that and installed the game, and made it through an entire 128 person WCS game with no freezes whatsoever. Microsoft pulled the 23H2 iso so you'd need to get it elsewhere, but if you can test that it may provide another data point. On my primary/newer Windows, I'd get freezes up to ~twice per minute, so there's an obvious difference here. There are more differences in the two installs than just the Windows version since that Windows install is years old and from my previous build, but that's gonna be the biggest difference, and 24H2 did make a lot of CPU and AMD related changes.

In T184946#2771104, @OopsIMadeStool wrote:

In T184946#2770987, @Leeroy1021 wrote:

Did you ever end up trying to go back to windows 11 23H2? I was thinking about it but didn’t know if that was a fix.

I had another drive with a 23H2 Windows install on it and booted into that and installed the game, and made it through an entire 128 person WCS game with no freezes whatsoever. Microsoft pulled the 23H2 iso so you'd need to get it elsewhere, but if you can test that it may provide another data point. On my primary/newer Windows, I'd get freezes up to ~twice per minute, so there's an obvious difference here. There are more differences in the two installs than just the Windows version since that Windows install is years old and from my previous build, but that's gonna be the biggest difference, and 24H2 did make a lot of CPU and AMD related changes.

Do you think the performance is still good with everything else in that version, I really only play arma, so I wouldn’t mind going back if it fixed but didn’t mess with everything else

In T184946#2771105, @Leeroy1021 wrote:

In T184946#2771104, @OopsIMadeStool wrote:

In T184946#2770987, @Leeroy1021 wrote:

Did you ever end up trying to go back to windows 11 23H2? I was thinking about it but didn’t know if that was a fix.

I had another drive with a 23H2 Windows install on it and booted into that and installed the game, and made it through an entire 128 person WCS game with no freezes whatsoever. Microsoft pulled the 23H2 iso so you'd need to get it elsewhere, but if you can test that it may provide another data point. On my primary/newer Windows, I'd get freezes up to ~twice per minute, so there's an obvious difference here. There are more differences in the two installs than just the Windows version since that Windows install is years old and from my previous build, but that's gonna be the biggest difference, and 24H2 did make a lot of CPU and AMD related changes.

Do you think the performance is still good with everything else in that version, I really only play arma, so I wouldn’t mind going back if it fixed but didn’t mess with everything else

I didn't notice any performance differences, but my PC is pretty beefy and new so I'm probably above average there and already get 120-140 FPS with high settings. Regardless it would be 1000% worth it just to get rid of the freezes which make it virtually unplayable. I'd play on 40 FPS if it meant no freezes.

In T184946#2771106, @OopsIMadeStool wrote:

In T184946#2771105, @Leeroy1021 wrote:

In T184946#2771104, @OopsIMadeStool wrote:

In T184946#2770987, @Leeroy1021 wrote:

Did you ever end up trying to go back to windows 11 23H2? I was thinking about it but didn’t know if that was a fix.

I had another drive with a 23H2 Windows install on it and booted into that and installed the game, and made it through an entire 128 person WCS game with no freezes whatsoever. Microsoft pulled the 23H2 iso so you'd need to get it elsewhere, but if you can test that it may provide another data point. On my primary/newer Windows, I'd get freezes up to ~twice per minute, so there's an obvious difference here. There are more differences in the two installs than just the Windows version since that Windows install is years old and from my previous build, but that's gonna be the biggest difference, and 24H2 did make a lot of CPU and AMD related changes.

Do you think the performance is still good with everything else in that version, I really only play arma, so I wouldn’t mind going back if it fixed but didn’t mess with everything else

I didn't notice any performance differences, but my PC is pretty beefy and new so I'm probably above average there and already get 120-140 FPS with high settings. Regardless it would be 1000% worth it just to get rid of the freezes which make it virtually unplayable. I'd play on 40 FPS if it meant no freezes.

Ended up doing it after a bit of research, a lot of people were complaining honestly about 24h2 as a whole, mostly with my cpu, and it works so much smoother now I think I got more performance surprisingly. I played two sessions for about two - three hours and didn't get a hitch once, other than when first joining the server and everything loading, my cpu never spiked like it was prior. I had barley anything installed on my m.2 that had windows so it was quick for me and I had most of my things backed up on my other ssd. All my other games are running perfectly normal as well!

For anyone that ends up running into this problem in the future I used this video on how to downgrade back to 23h2 - https://www.youtube.com/watch?v=T7Jwu4j8uSw&ab_channel=Pureinfotech

I am also on 24H2 and an AMD Ryzen 7 7800X3D. Identical issues as described earlier

Bumping this thread/report as I'm also experiencing the same issues/symptoms!

Update: I have downgraded to Windows 11 23H2 (from 24H2) and I have played for 5 hours today and had 0 freezes.

Interesting; I really don't want to downgrade / reinstall Windows just for 1 game having issues... I might just hold out in hopes that the next Windows version update fixes it, or Arma Reforger devs fix it.

I'm still thinking it's something in conjunction with the Windows 11 24H2 update, as it seems majority of the playerbase is not having these major freezes and I imagine most people are keeping up to date with Windows updates.

It has to be 24H2 and Arma not liking each other with the Vcache. Even trying it on linux when I originally posted this support thread, proton had no issues translating arma and I had no issues with linux.

I am in the same boat, can't be bothered doing a fresh install, only did one 2 months ago and have done 3 since my original issue. Hoping there is a fix in the pipeline soon so I can get back to playing Arma

Same Problem: Clearly 24H2 and Vcache CPU Problem.

Very bad stutter every like 3 minutes. down from steady 120 FPS to 20 or 70. Sometimes a 5 Sec lock.

Tested different BIOS, tested all Settings. tested different chipset drivers and Nvidia drivers.Tested 7 days.

Then i installed Win 23h2, no stutters, all good.

9800X3D, 4090, NVME SSD, 64 GB RAM 6000. X870 Tomohawk Wifi, lates Bios as of March 2025.

Clearly a Problem with 9800X3d / or other AMD CPU and Reforger only in 24H2!!

24H2 worked fine with my old setups: same 4090 but 12900k and different RAM

None of the other 10 Games i tested had this Problem

Also this happens on vanilla official servers without mods; see reforgerReddit for lots of user having this problem.

So windows 23h2 works. So this means we have to reinstall windows with all the stuff and settings again?

In T184946#2781246, @hageshiku wrote:

So windows 23h2 works. So this means we have to reinstall windows with all the stuff and settings again?

100% working. tested many times. Problem is you cant get 23H2 from Microsoft anymore. Plus 23H2 will force update into 24H2. you must disable that. all very problematic but BIS and Microsoft are busy with other stuff. they dont fix.

Anyone test 1.3 yet? I saw some callouts about multi threading improvements and memory leak fixes.

In T184946#2781354, @thuggins wrote:

Anyone test 1.3 yet? I saw some callouts about multi threading improvements and memory leak fixes.

Same problem

@Geez any update on this?

In T184946#2781354, @thuggins wrote:

Anyone test 1.3 yet? I saw some callouts about multi threading improvements and memory leak fixes.

Fired up my 24H2 build, still getting the freezes on there. After ~160 hours, haven't had a single one on my 23H2 old build.

In T184946#2781372, @thuggins wrote:

@Geez any update on this?

Unfortunately no news I could provide.

7800x3d
7900XTX
32 GB DDR5@6000Mhz
Windows 11 Pro 24H2
Samsung 990 Pro 2 TB SSD

I also get massive stutters in multiplayer servers. Happens on Everon and Arland, 64 and 128 player servers. I suspected it was related to texture streaming so I drove up and down Everon in a supply truck in Game Master and encountered zero stutters over an hourish of play.
I've tried: changing in game settings, enable/disable REBAR, enable/disable framerate caps in driver settings and RTSS, fresh install of windows, disabling all overlays and monitoring software, disable/enable Game Mode, enable/disable HAGS, only plug in one monitor to my GPU, different BIOS versions, chipset versions, straight up uninstalling chipset drivers, GPU driver versions, different GPU driver settings, no fast startup, etc.
Stutters are frequent and often long (2-4 seconds). I have attached footage of some softer, but still very big, stutters from the most recent patch. Problem existed before 1.3, during last patch for 1.3, and newest patch.

Edit: It doesn't matter how long I have been playing the game. It can happen instantly, it doesn't wait until I've been playing for hours.

@Geez
Can I pester you for another update?
Is the team aware of the issue or is it a lower priority issue?
No malice, just asking for a little transparency as it seems to be gaining a bit of traction now.

Thanks!

Have exactly this problem with my 9800x3d and 5090. Tried lasso but nothing helps. Ended up refunding.