I streamed firstly with 5000 bitrate, secondly with 4000.You have a decent CPU. You should consider using it.
As to your GPU streaming question, it depends. If the bitrate varies too much (or drops below a certain level, or doesn't match Youtube's specs) then your stream can 'stop'. If you can post a log from when this happened to you, it would hopefully help in trying to troubleshoot the issue.
This is a wrong stream too.You have a decent CPU. You should consider using it.
As to your GPU streaming question, it depends. If the bitrate varies too much (or drops below a certain level, or doesn't match Youtube's specs) then your stream can 'stop'. If you can post a log from when this happened to you, it would hopefully help in trying to troubleshoot the issue.