I need someone that knows alot about BM-700 Condenser Microphones and of which can help me with what is wrong with my settings and how can I get the quality to sound better.

Samples of me testing the microphone here: http://www.twitch.tv/nickybower/b/496463775

if its something to do with the fact that the microphone is plugged at the back of the PC then tell me. (its currently in 3.5mm jack) and it does also have Built in NVIDIA Output though I'm still trying to figure where that is

PC Info Below:
http://i42.tinypic.com/28l53ic.png
http://i42.tinypic.com/28l53ic.jpg
http://i42.tinypic.com/1zqaa9w.png
http://i43.tinypic.com/2zi0und.png

And last I do normally upload videos using Dxtory. Many options on the Hz and it shows different sort of quality in each and i'm wondering which amount of Hz is the recommendation of boardcasting or in-game recordings?

Edit: Fixed broken url.