Perfomance issues whilst streaming

[KartProwler]

I recently got my hands on a new PC, with reasonably high specs. But, it seems to have a problem with streaming, no matter what kind of streaming it is.

On the livestream procaster interface, it tells me it's only using 30% of my CPU's power, however, it shows it's streaming at 10fps and slows my computer to a crawl, i can't physically draw properly whilst the program is streaming something.

Specs:
GPU: AMD Radeon HD 7950 6GB
CPU: AMD FX6100 Six-core processor ~3.3 GHz
OS: Windows 8 Home 64bit
8Gb RAM

If there's anything else about the pc that i need to put here, i'll be happy to provide it.

Kart.