I have a HP Omen 16 with a Ryzen 9 CPU and RTX 3070. It has 32GB of RAM and an additional SSD (NV2 PCIe 4.0 NVMe M.2 - 4TB capacity 3500MB/s transfer rate)
It used to have 2 8Gb sticks of DDR5 4800 RAM and just the 1TB SSD. I upgraded to 32 GB RAM, DDR5 4800 (two 16Gb sticks) and the 4TB SSD. I installed MSFS on the second drive because I was running out of space.
Performance used to be really good with no stutters apart from with the Okavango Delta scenery from SWS. I use ATC Chatter and FS Realistic and with these programs everything was great before the upgrade. I wish I had not upgraded now.
Now I have continual stutters everywhere. I get stutters at 60 fps. Its made the sim unusable. Iāve cleared out most of my community folder to no effect. I have tried removing shader cache, DLSS fixes and even running the sim on medium settings. Nothing has made a difference.
On the hardware side I have run all sorts of memory, CPU, motherboard, storage and CPU tests. These have been very heavy stress tests and all of these tests have passed. I really donāt know what to do next. Any suggestions would be very welcome.
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There are two questions that come to mind:
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Is the new RAM on the motherboard QVL?
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Are you sure the RAM sticks are in the correct DIMM slots? I assume you put the 16GB modules in the slots where the 8GB modules were when you didnāt have this problem. But you know what they say about assumingā¦ Wonāt hurt to refer to the MOBO manual and double-check.
You might also want to add an exception in Defender for the folder containing the sim files. This will stop Defender from scanning those files in realtime.
I also have two M.2 drives. The sim and all related files are on the bigger one.
On my motherboard, that M.2 slot disables the PCI_3 slot, which isnāt a problem, since I donāt use that slot. Perhaps the new 4TB drive is in a PCI 3.0 M.2 slot. Itās compatible, but isnāt taking advantage of that driveās PCI 4.0 architecture. You could run a disk test. I use this free one from ATTO.
I know you said you ran a āstorage test,ā but wasnāt sure what that meant.
Hi, thanks for your reply. Iāll need to read about QVL. The RAM was recommended on the Kingston website when I entered my laptop model number as being compatible. It is Crucial RAM.
I put the new RAM sticks in the same DIMM slots the same slots the 8Gb sticks came out of and the BIOS recognised these straight away. What I meant by āstorage testā was a test of the new SSD but I will try the one you suggest.
Iāll take away your suggestions and see what occurs.
Thanks
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In the sim, can you enable developer mode and then go to Debug ā Show FPS? Take a screenshot when the stutters are there. This way we can identify the source of the stutters. It might be CPU, GPU or storage
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I had the same problem with my new hardware. On my old computer I had the same problem, so I thought that it would be gone by replacing it with powerful hardware. But the problem was still there, and sometimes it made flying impossible because only a few frames were left per second. By reading on this forum, I have found that the MSFS data cache is causing it. In some sceneries, the data that comes from the internet cannot be written fast enough to the disk because the volume is too big, and in that way it disturbs the flightsim. I have tried to move the cache map to another disk, but this doesnāt help. By switching off the cache completely the problem is gone and stutters are not seen anymore. The internet download is a bit higher now while flying, but in my case the monthly limit is very high.
Thanks Iāll do that this evening
I may have tried this but I canāt recall but this is certainly worth a shot. Thanks.
Iāve heard it said that the RAM manufacturerās compatibility list is usually as or more reliable than the MOBO mfgās. Sounds like you did your homework.
might be worth testing the speed of your M.2. Drivers to see if you are getting what you expect out of them. FS does help being on a fast drive and if you have a fast internet connection disabling rolling cache.
Indeed, I know the phrase about assuming thingsā¦ itās the mother of all ( Have to censor myself here before the moderators do)
Your questions and comments are to the point 
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I just upgraded mine to the i9-14900k with the 4070ti and 64gb ddr5 ram. Right now im at 18.3/63.7GB of ram.
This is what Iām seeing and i can actually hear the sim stuttering when ATC is on.
The sim is stuttering badly at what appear to be fairly decent fps. This is on medium setting. TLOD = 50 etc
I tried ATTO. It returned no errors but the C Drive has a markedly faster transfer rate than the second drive which I call the SSD drive in the pictures below. The sim is installed on the SSD drive.
Thats interesting and Iām not saying this is the issue but the lower block sizes your drives really struggle. Iām running FS on a rubbish 1TB SSD SATA Drive, not even M2 NVME. But my lower block speed is much higher which is probably where Flight Simulator is operating at if its loading from things like the rolling cache. Have you tried disabling rolling cache to see if it helps? This is what I get on my rubbish SATA drive. Your upper readings are spot on, its just when the block sizes get smaller.
OS Drive
Flight Simulator Drive
I would suggest swapping the drives into the other oneās M.2 slot and rerunning the test. But if the two drives have different pin slots, that might not be possible. Even if the drives fit into either slot, they may not work. I donāt think it would hurt to try.
Windows doesnāt care which drive is the bootable system drive, and your UEFI BIOS shouldnāt care about how boot order is set either - it will just go through the drives until it finds the boot partition.
Disclaimer: Iām not an expert about this sort of thing. I donāt think you can hurt anything (as long as - obviously - you donāt try to force a square peg into a round holeā¦
So you had Windows on the 1TB drive and then installed the new 4TB drive and now Windows is on the 4TB drive? Did you reinstall Windows by any chance?
No Windows is on the 1TB drive. The sim is on the 4TB drive. I moved it to the 4TB drive because I was running out of space on the 1TB. I havenāt reinstalled Windows. The laptop is only a year old
Iām just wondering whether it might be worth reinstalling the sim on the 1TB. With steam you can install different programs to different drives. My Community folder used to be about 300-400Gb but I have tidied it up significantly since this issue started so its now about 70Gb. Iām reluctant to move the 1TB as it has a heat patch and Iām worried about damaging something. The laptop is still under warranty.
I can try also removing rolling cache before doing anything to see if that helps.
What is the nature of your FPS stutter? Is it āconstantā or āperiodicā?
I am asking because on my system, where I did not change the hardware for over a year, recently a really nasty āperiodicā stutter showed up. So on my side:
- I see normal FPS ā¦ smooth
- ā¦ and after a while (every 5 to 10 minutes) ā¦ I get a stutter which reduces the FPS down to 1 to 5 FPS ā¦ for about 10 seconds ā¦ and then it is back to normal.
So I can rule out a hardware cause on my side, but and there was no major sim update in that period either ā¦ so I suspect some Win10 or AMD driver aspect is now triggering this.
Its now a constant stutter. I can barely go a hundred metres before it either stutters or freezes up completely for a matter of 5+ seconds. Panning round the cockpit also causes stuttering.
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