desktop screen capture software

[Tuanie]

Looking for an easy to use capturing software program. 
Want to record my desktop screen , with no lag and allow exporting files. Converting files to youtube format would be a plus also! 

 

[Aurora906]

Shadowplay does a good job, and doesnt take much cpu power to run.  Comes with Geforce Experience   You can set it record just games, or the desktop too.

[Lord Gaben]

My preference is OBS, but OBS can be a bit hard to use for someone new to screen capture, I would recommend XSplit

[ExcitezR]

Nvidia's shadow play if you have an nvidia card or OBS