Is alot of things you can do hard to say but you definatly cant play games and record at the same time.getting e-mail .Chatting on forum's dont take much.
Suposedly if you use this it takes a lot of the load of your processor. Though i havent used one.
Im guessing your thinking running your CPu at 100% would mean damage.it isnt gonna damage it. The reason it run's at 100% is for the best picture quality.I should say it run's very high i guess.It varies a bit.If you start playing games and do stuff while recording puts pauses in your show's.
When it isnt recording is on idle or you shut it off.It does nothing ether way.
There forum is here.Most the things be there.