Like the title says, I have a laptop & a 1440p monitor (although I have set it as 1080p for performance reasons), and I get insane lag while playing any games, even when my CPU & GPU usage is almost always around 50%. Also, I hae FRAPS installed, and sometimes it says that I get 60+ fps but the game still looks like a power point presentation. What could cause this?

Thanks in advance :)