Unreal Engine Game: 120 FPS Standalone, 70 FPS through Steam. Same Build.

Development Platform & Builds
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My Unreal Engine demo has a huge performance bug only when launched via Steam.

  • Standalone .exe: 120 FPS, GPU 85%, CPU 80%.

  • Steam Demo: 70 FPS, GPU ~65%, CPU ~55%.

  • The build is identical.

  • Steam Overlay off, offline mode.

The game isn’t fully utilizing the hardware through Steam. Feels like a massive CPU-side bottleneck or blocking call introduced by Steam. Help!

1 Like
2

it could be that steam is forcing vsync, and if ue can’t match 120 it might fall to 70~

but that’s an idea though.

i would recommend to make a build with insights enabled, and then connect to that build.

you can connect insights to almost any build, even through the network.

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Something similar happened a while ago with Call Of Duty on Steam, It was getting ~50% less performance than the other platforms it was on..