How do I turn V-Sync on or off in Train Simulator Classic?

To turn V-Sync on or off in Train Simulator Classic, first use any V-Sync setting shown under graphics or display options. If you do not have it, close the simulator and create a per-game graphics-driver profile for the RailWorks executable. Set Vertical Sync explicitly, apply the profile, then restart the game.

V-Sync synchronises completed frames with the monitor’s refresh cycle. Turning it on removes horizontal screen tearing, but it can add control delay or make frame-rate drops feel less smooth. Turning it off reduces that delay and permits an unrestricted frame rate, although tearing can become visible.

I don’t have it or cannot find it — where do I need to go?

Use a per-game graphics-driver profile if Train Simulator Classic does not show a V-Sync option in its own graphics or display settings.

Some installations and rendering modes simply do not expose the setting. If you open the menu and find that тут ничего такого нет — “there is nothing like that” — the installation is not necessarily broken.

1. Check the simulator’s settings. Look under its graphics or display options for V-Sync or Vertical Synchronisation. Apply the required value and restart if the setting exists.
2. Find the installation folder. In Steam, open Train Simulator Classic’s properties and use the installed-files browsing option. The folder normally ends in steamapps\common\RailWorks, although a separate Steam library can be on another drive.
3. Identify the running executable. Launch the required 32-bit, 64-bit or alternative renderer mode, check the process name in Windows Task Manager, then close the simulator before creating the profile.
4. Add a per-game profile. Select the relevant RailWorks executable in the graphics software rather than changing the global V-Sync setting for every application.
5. Choose the synchronisation mode.
   • NVIDIA: in NVIDIA Control Panel, open Manage 3D settings, select Program Settings, add the executable and set Vertical sync to On or Off.
   • AMD: add Train Simulator Classic under the gaming profiles and use the standard vertical-refresh control if it is offered for that game. Enhanced Sync is a different presentation method, so disable it while testing conventional V-Sync. Some AMD driver packages do not offer an effective forced V-Sync override for every rendering API.
   • Intel: add the executable to the game-specific settings in Intel’s graphics software and change its V-Sync option. The label and menu location differ between Intel driver packages.
6. Apply, relaunch and test. Pan past cab pillars, platform signs or other vertical edges. A moving horizontal split through those objects is screen tearing.

Resolution, anti-aliasing and scenery settings can obscure the result by depressing performance. Our explanation of how to balance Train Simulator Classic’s main graphics settings covers those controls separately.

Which RailWorks executable should I select?

Profile the executable used by the launch mode you actually play, not Steam itself or an unrelated launcher.

• RailWorks64.exe is normally used for the 64-bit edition.
• RailWorks.exe is associated with the older 32-bit mode.
• An alternative renderer may launch through another executable, in which case that executable needs its own profile.

A mistake we see often is configuring RailWorks.exe and then launching RailWorks64.exe. It is safe to create profiles for both if you regularly switch modes. Task Manager’s process details provide the clearest answer when the launcher wording is ambiguous.

How do I turn off V-Sync and uncap FPS?

Disable V-Sync and every separate frame-rate limit; changing only one of them may leave Train Simulator Classic capped.

1. Set the game-specific Vertical Sync control to Off.
2. Disable any driver option named Max Frame Rate, frame-rate target or similar.
3. Open Train Simulator Classic’s Steam properties and inspect Launch Options. If you previously added an option beginning with -FPSLimit=, remove it.
4. Restart the simulator and test the same route, train, weather and camera position.

If no launch option is present, there is nothing to remove there. An uncapped simulator also will not produce more frames than the CPU and GPU can render, and a monitor cannot visibly present every complete frame above its refresh rate. If the aim is higher performance rather than merely removing a ceiling, follow our Train Simulator Classic FPS troubleshooting steps.

Should V-Sync be on or off in Train Simulator Classic?

Turn V-Sync on when tearing is distracting; turn it off when lower latency or the highest possible frame rate matters more.

Train Simulator Classic can be limited by its main processing thread and by route-asset loading. If performance stays below the monitor’s refresh rate, enabling or disabling V-Sync may make little difference to the FPS counter.

I did it, but V-Sync still has no effect

An ignored V-Sync change normally points to the wrong executable, a conflicting presentation option or a test that cannot reveal the difference.

• Wrong profile: confirm whether you launched the 32-bit, 64-bit or alternative renderer executable.
• Application-controlled setting: this may do nothing if the simulator makes no active V-Sync request. Choose an explicit On or Off override where the driver supports one.
• Windowed or borderless mode: the Windows desktop compositor can suppress visible tearing independently. Compare settings in the simulator’s full-screen mode if one is available.
• FPS below refresh rate: an expected 60 FPS ceiling cannot be demonstrated while a route is running at 35 FPS. V-Sync does not create additional performance.
• Conflicting technology: temporarily disable Enhanced Sync, Fast Sync, adaptive sync and external frame limiters. Test conventional V-Sync alone before adding another feature.
• Hybrid-graphics laptop: make sure the profile belongs to the GPU actually rendering the simulator.
• No restart: close and reopen Train Simulator Classic after applying the profile.

Does V-Sync fix stuttering?

V-Sync fixes tearing, not the CPU-bound hitches and asset-loading pauses found on complex Train Simulator Classic routes.

It may make motion appear steadier when frame delivery remains close to the display’s refresh rate, but it can make larger drops more obvious. Persistent pauses call for changes to scenery density, shadows, view distance or other performance-heavy settings rather than repeated V-Sync changes.

Are you trying to disable DSD rather than V-Sync?

To disable DSD in Train Simulator Classic, check the gameplay settings for a driver-vigilance option or use the locomotive’s in-cab DSD isolation control; DSD is unrelated to graphics and V-Sync.

DSD means Driver’s Safety Device, sometimes discussed with vigilance or deadman controls. The implementation varies between default stock and add-on locomotives.

1. Open the gameplay settings. Look for Driver Vigilance Device or similarly worded vigilance assistance. Turn it off before loading or restarting the scenario if that option is present.
2. Check the cab controls. If there is no gameplay option, look for a control labelled DSD isolation, DSD cut-out or vigilance isolation. Some locomotives implement the system through their own scripts.
3. Use the vehicle’s documented key mapping. There is no single isolation shortcut that can safely be assumed for every locomotive. A scenario may also force the system or prevent isolation.

DSD and AWS are separate safety systems, so disabling one does not necessarily disable the other. For the surrounding throttle, brake and cab-control basics, see our guide to driving trains in Train Simulator Classic.

Does this apply to “game train45” or another train game?

No; the RailWorks executable names and folder instructions apply specifically to the Windows PC version of Train Simulator Classic.

The phrase game train45 does not identify a Train Simulator Classic setting or executable. If a different title is running, use that game’s own display controls and create a driver profile for its actual executable rather than selecting a RailWorks file.