Description of the issue: CTD on sim startup
Every time Sim starts up, it crashes at 63%
Please list clear steps you took in order to help our test team reproduce the same issue:
Downloaded SU5 Beta - Crashes at 63%
Clean install of sim on SU5 and empty community folder, - Crashes at 63%
Disable Frame Generation in the xml - Sim does not crash and loads up
Enable FSR Frame Generation in the sim settings when it is disabled - instantly crashes
Return to SU4 - Sim does not crash and loads up
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 User Support Hub.
What peripherals are you using:
What GPU (Graphics Card) do you use? RTX 3070 Ti
What other relevant PC specs can you share? N/A in this case, Frame Generation is the issue.
The topic title should be updated to clarify the issue. A suitable revision would be:
[SU5] Beta 1.7.6 - CTD when loading into sim (Frame Generation AMD FSR3)
This makes it clear that the crash is related to Frame Generation AMD FSR3, not a general frame generation problem.
Anyway, after changing from “None” to Frame Generation NVIDIA DLSS x2 or x4, I didn’t experience any CTDs when loading MSFS.
But after switching to Frame Generation AMD FSR3 and restarting MSFS, I got a CTD.
Fault bucket 2016066783380607062, type 4
After the third and fourth launches, I didn’t experience any CTDs with Frame Generation AMD FSR3 enabled.
MSI X870E Carbon WIFI, 64GB 6000 DDR5, RTX 5090 Gaming OC (591.86).
I have not had this issue on my PC. AMD FSR3 was enabled prior to SU5, and I have loaded into the sim multiple times since the upgrade without any issues.
Expand to see my basic PC specs:
Item
Setting
CPU
i7-12700K (no overclocking or undervolting)
RAM
32 GB 5200 MHz DDR5 CL40 RAM
GPU
AMD Radeon RX 9070 XT (16GB) Driver v32.0.23017.1001 (Adrenalin v26.1.1)
Rebar BIOS Setting
On
Main MSFS monitor
55" Hisense U7 4K TV @ 120Hz
Secondary monitors
Two 32" 1080p 1360 x 768 @ 60 Hz
Internet
Starlink, with max download speeds of ~ 400 Mbps
Peripherals
Microsoft USB Natural Keyboard, Microsoft USB Wireless Intellimouse Explorer, Turtle Beach VelocityOne Flight Yoke & Rudder.
OS
Windows 11 Pro 25 H2 v26200.7840 + all OS updates.
MSFS 2024 Edition
MS Store Aviator + all WUs & CUs
Build Version
SU5 v1.7.6.0
Downloaded Core Content
None (i.e., all Streamed)
Marketplace Addons (Streamed)
BijanStudio Seasons Enhanced 2024 v3.5.0, MamuDesign Marinas v0.9.3, Seafront Simulations Global Shipping 24 v13.0, Black Square Real Taxiways 2024 v0.1.0
Expand to see my graphics settings
Item
Setting
Display Mode
Full Screen
HDR10
On
Exposure Compensation EV
-1
Full Screen Res
3840 x 2160
Anti-Aliasing
TAA
Render scaling
100
AMD FidelityFX Sharpening
200
Max Frame Rate
On
Max Frame Rate Value
60
Frame Generation
AMD FSR 3
Framerate Multiplier
2x (N/A)
VSync
Off (N/A)
VSync Interval
Half refresh rate (N/A)
Dynamic Settings
On
Frame Rate Target
40
-
-
Global Rendering Quality
Custom
Terrain LOD
400
Off Screen Terrain Pre-Cache
Ultra
Displacement Mapping
On
Buildings
High
Trees
Medium
Plants
High
Rocks
High
Grass
High
Object LOD
200
Volumetric Clouds
Ultra
Texture Resolution
High
Anisotropic Filtering
16x
Water Waves
High
Raytraced Shadows
Off
Shadow Maps
2048
Terrain Shadows
512
Contact Shadows
High
Windshield Effects
Medium
Ambient Occulsion
High
Cubemap Reflections
256
Raymarched Reflections
High
Light Shafts
Ultra
Depth of Field
Ultra
Motion Blur
Off
Visual Particle Effects Quality
High [NEW SU5]
Glass Cockpit Refresh Rate
High
Characters Quantity
Low
Characters Variety
Ultra
Characters Quality
Medium
Airport Services Quantity
Low
Airport Service Variety
Ultra
Parked Aircraft Quantity
Low
Parked Aircraft Variety
Ultra
Aircraft Traffic Quantity
Low
Aircraft Traffic Variety
Ultra
Road Traffic
Ultra
Sea Traffic
Off (Using Seafront Simulations Global Shipping 24)
Fauna
Ultra
Seatbelt Visibility
On
Expand to see my other settings
Item
Setting
Online Tab
Photogrammetry
On
Aircraft Traffic Type
Real-Time Online
Air Traffic in Career
Off
Live Weather
On
Multiplayer
On
Multiplayer Servers
East USA
Show MP aircraft in close proximity
Off
Multiplayer Replication Models
High Fidelity
Rolling Cache
16GB
Bandwidth
Unlimited
Flight Model Tab
Flight Model
Modern
Advanced Options Tab
Developer Mode
Off (Dev-FPS enabled by using the -showFramerate switch)
Zadma
February 14, 2026, 6:23pm
4
I believe the conflict here is having dev mode enabled with Smart Docking. If you delete UserCfg, boot the sim, enable dev mode, disable smart docking, and then enable frame generation, you should be fine if my theory holds.
3 Likes
I’ll test your idea because that’s what happened to me.
As soon as I enabled dev mode, the simulator crashed and I can’t open it anymore.
Zadma
February 14, 2026, 6:37pm
6
Deleting UserCfg restores settings to default which should disable FG and allow you to boot the sim and follow the above steps. Good luck and let us know if that works!
You don’t need to delete the usercfg.opt file - just edit FrameGeneration line so that it has NONE (which simply means frame generation is disabled) instead of FSRFG or DLSSG.
Regarding Smart Docking, in one thread I recommended turning it off because it can affect performance when Frame Generation is enabled, so it might also be a potential cause of CTDs.
https://forums.flightsimulator.com/t/solved-nvidia-dlss-broken-enabled-but-does-not-work/756086/2?u=tenpatrol
1 Like
Zadma
February 14, 2026, 7:22pm
9
Yeah, fair point - I spend most of my beta testing with default settings so this is the easiest solution for me, but totally reasonable to just change the single line within. Thanks!
1 Like
This does work, but enabling dev mode with FSR3 FG enabled will crash again.
Zadma
February 14, 2026, 7:29pm
11
It shouldn’t once dev mode has smart docking disabled, which is persistent between sessions.
Try.
Close MSFS 2024 SU5 beta.
Open usercfg.opt file and edit FrameGeneration line so that it has NONE (which simply means frame generation is disabled) instead of FSRFG or DLSSG.
Save changes.
Then launch MSFS again and open Developer Mode. If there’s no CTD, while in Developer Mode, go to the Options tab and turn off the Smart Docking System.
This does, in fact, work as a temporary fix, but Smart Docking System is something I do use. Hopefully devs can get both working back together again
2 Likes
This CTD is very easy to reproduce. You just need to enable Developer Mode and make sure the Smart Docking System is checked. Then turn on Frame Generation and select AMD FSR3 - the CTD happens instantly.
Fault bucket 1897429385600108003, type 5
If I was able to force the crash that easily, the team responsible for testing and verifying bugs should have no trouble reproducing it as well, and the thread will likely end up with a bug-logged
PC specs (partial): MSI X870E Carbon WIFI, Ryzen 7 9850X3D, 64GB DDR5 6000, RTX 5090 (591.86).
1 Like
Thinking logically.
Dev mode is used by developers, therefore no Asobo developers (with framegen, Nvidia and smart docking) tested the 1.7.6 Beta.
Occam’s Razor?
