LOL, you'll be able to stream extremely well. Your system is way overkill for CSGO which is perfect for streaming + gaming.
Just for the record, I have a Core i5-4690K (4.5ghz) and a GTX 750 Ti graphics card. I'm able to record a buttery smooth 60fps & 1080P (rendered from 1080P to 720P to keep drive space free) in Portal 2, with super high quality (I think I had the recording set to 30mbps since I'm recording to a HDD).
As for internet stuff, remember UPLOAD speed is more IMPORTANT than download speeds when streaming. I believe for 1080P the most optimal is 8mbps UP (remember upload not just download). Then for 60fps 1080P you need to double that speed.