I had no problem with OBS Studio until today. The same thing happened with OBS Classic, as well. I used QuickSync and not Encoder x264 because QuickSync is a lot smoother and it's not laggy at all. But today, I opened up OBS and wanted to record, but on the preview and the recording, I was only getting 15-20 FPS, and before that I ran it just fine at 50+ FPS whilst streaming/recording. I have no idea what the problem is. With QuickSync, I was using Balanced and it worked perfectly fine, 50+ FPS. And then today I open up OBS Studio, and the setting are unchanged, but it has an extremely low frame count. I even tried changing QuickSync to Speed and it still did not a thing. What is the problem?