The editor frame rate drops from 120+ to 70 when i maximize it. I personally would be okay to use the editor at 70 frames but %1 is so low and I get crazy micro stutters when maximized. I tried toggling editor’s V-Sync, changing editor frame rate limit, toggling FreeSync and Enhanced Sync but none worked. I didn’t have this issue in 5.3 or 5.4. I could fix this issue by enabling FreeSync in 5.5, but that doesn’t work in 5.6. I also tried switching GPU driver version and reinstalling Windows and those didn’t work either. Does anyone else experience this problem?
After digging real deep and searching for a solution, I found out that this is caused by Windows Multi-Plane Overlay conflicting with my AMD graphics card and how Unreal Engine Editor renders when its maximized. Creating a 32-bit DWORD value named “OverlayTestMode” in Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm registry path and setting its value to 5 hexadecimal fixed the problem. You can try this solution if you are struggling with a similar problem. By the way, this also fixed my problem with using hardware acceleration on Chromium based browsers.
