Fullscreen vs Windowed Fullscreen FPS

Hello. Last time I played PoE [ Legacy League ] I had rather similar fps in both display modes. Now if I play in Fullscreen it works fine but when I hit windowed fullscreen it cuts around 40fps from it.

Is this a known issue?

Any 'windowed' mode does not allow the game exclusive access to system resources, fullscreen does.

In windowed the video resources, memory and cpu usage have to 'play nice' with the operation system.

I know what you're saying. I note that I understand how it works, but my problem is other.

In 2 different frametimes I get really different results. I'm ok with a 5-15% performance decrease like it was before. But it gets up to 40% sometimes, which seems a bit extreeme considering the system isn't stressed even at 60%.

Long story short: I got the resources to get better performance even in windowed fullscreen but they're not used.