Hey there and sorry for bringing this back up, but I have the exact same problem since the beginning of msfs and never found any solution to fix it.
I think I nearly tried everything possible for me, but as of now I am out of new ideas.
Maybe someone of you guys found a possible fix and want to share it.
I benchmarked my frametimes and CPU usage and everytime a “lag” happens, my GPU frametime goes to 0, then up to about double the normal frametime and back again to stable 20-25ms. CPU usage also goes down to 0 on some of the cores, then up to 100 and stabilizes again at the normal rate which is around 40-70%.
All of that happens at the same time when the game lags for around half a second or so.
My system at the moment:
- 13900K stock clock rates
- 3090ti watercooled and undervolted
- 64GB DDR4-3600 running at 3200 (had 32GB DDR4-3000 before)
- Samsung 970 evo m.2
- Asus Strix Z690 motherboard
Here are some fixes I tried (I maybe don’t remember everything I did)
- clean install on a new and clean windows pc (new xbox account)
- rolling cache on and off
- shader cache on with different sizes and off
- cranking up DLAA to 200% to get limited by GPU
- different nvidia driver versions throughout the months and years
- stock clock of cpu and gpu and also overclock or undervolt both of em in different configurations
- hyperthreading on and off
- with and without any mods
- disconnected all usb devices despite of keyboard and mouse (even my soundcard)
- disconnected the two usb3 headers of the front I/O
- problem also happened with my old 12600K and 2070 Super as far as I remember
I can’t imagine that there’s nothing I can do as so many people seem to not have this kind of issue.
I also found out that these spikes occur mostly when new landmarks are being loaded while flying. While in flight, the frametime peak seams to be a bit worse compared to standing on the ground.
Mostly this occurs about every 30-60 seconds. It’s not game braking, but nerve wrecking 