In all my time working with/on PCs I've seen a lot. But never before today have I seen a computer running in slow motion. I don't mean that the PC is running slow, like I open a program and it takes forever to load and games are laggy. No, everything is super smooth and responsive, games don't lag or have FPS issues/drops. But everything is like those slow motion shots you see on TV and youtube all the time.
It went away after a restart of the PC, but I'm wondering if anyone else has ever seen this and/or know what caused it so I can try to prevent it from happening again.