Are you using Developer Mode or made changes in it?
Issue exists whether in dev mode or not. I do use it occasionally to find variable and event names while developing instruments for Air Manager.
Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.
Yes, the issue also happens with a plain vanilla sim, no add-ons or community folder entries.
Brief description of the issue:
Frame rates are terrible (~20’s) and I can’t select DLSS as an option in the graphics menu. Granted I have a lot of pixels to generate (see specs below) but I also have the horsepower that used to be able to get me 50-60FPS with the exact same parameters. I suspect there’s an issue with properly identifying the primary graphics card in my system. It does partially work in the sense that in my UserCfg.opt file, it shows my RTX4090 and also in Task Manager, it shows that GPU0 (the 4090) is running FlightSimulator.exe. I just can’t use DLSS, or Frame Generation either, for that matter. It does provide me with the option to use AMD FSR 2, but I don’t even have an AMD graphics card. I do have my AMD IGPU disabled in BIOS. It doesn’t show up in the Device Manager list (see screenshot).
I suspect the issue stems from the fact that I also have an Intel ARC A380 in my system, along with a USB to HDMI converter (It’s a Startech branded one that shows up as Trigger 6 External Graphics under Display Adapters). The Intel and USB adapter are used for 5 external touch monitors that I use for my Air Manager instruments.
I believe the issue started with Sim Update 14, and most definitely the smoothness got worse with SU14. I’ve had very choppy/stuttering graphics, particularly in my main, central display. The two displays on each side appear smoother.
Also, I have tried to “steer” applications and add-ons to use a particular GPU (in Windows11 System->Display->Graphics menu) to free up as many resources as possible for the 4090 to render the sim. I can verify that the 4090 is running the sim by looking at Task Manager. But even after removing this “steering” executables towards specific GPUs, the issue persists.
If I disable the USB adapter, frame rates are back to ~60 and DLSS becomes an option. So it’s obviously something with the drivers for the USB adapter but ALSO something in the way that MSFS is assigning rendering tasks.
Provide Screenshot(s)/video(s) of the issue encountered:
Detailed steps to reproduce the issue encountered:
See above but basically run the sim with or without any addons and frame rates are terrible, along with DLSS not being available. Removing USB adapter “fixes” the issue BUT… I still would regard this as an MSFS bug though because of the way it is handling the rendering tasks and disallowing DLSS to be used on a top-of-the-line Nvidia graphics card.
Many issues may be due to an outdated graphics card. Please state your Graphics Card Driver Manufacturer (NVIDIA, Intel, AMD) and Version (Learn how to find your current graphics card driver version):
Nvidia v551.46
PC specs and/or peripheral set up if relevant:
Windows 11 Home
MSI x670E ACE
AMD 7950x3D
64GB RAM
MSI 4090 Suprim Liquid X
Asrock Intel ARC A380
Startech USB32HD2 USB->HDMI adapter
3x4k TVs running on 4090 (4k 10bit RGB HDR 120Hz)
2x1080p touchscreens on A380
2x1024x600 touchscreens on A380
1x1080p touchscreen on Startech adapter
Build Version # when you first started experiencing this issue:
1.36.1 or maybe even earlier