2.Disable High-Memory Launch Options:Steam Settings.
In Steam, right-click Garry's Mod > Properties > General. Clear any custom parameters in Launch Options (such as high force-resolution options or -dxlevel overrides).
Verification: Relaunch GMod to ensure default DirectX parameters are applied.
3.Clear the GMod Download Cache:Storage Cleanup.
Close Garry's Mod. Open File Explorer and navigate to C:\Program Files (x86)\Steam\steamapps\common\GarrysMod\garrysmod\ (or your custom install directory). Delete the contents inside the downloads and cache folders.
Verification: Rejoin the server; it will re-download only the necessary assets without retaining bloated cached files.
4.Force DirectX 9 Mode in Launch Options:Fallback step.
In Steam, right-click Garry's Mod > Properties > General. In Launch Options, add -dxlevel 90 or -dxlevel 95, then launch the game.
Verification: Check if the game loads stable. Once successful, you can remove -dxlevel from launch options so it saves the setting without resetting your resolutions on every launch.