White noise in microphone recordings?

[aminothebambino]

Here's how it sounds: https://soundcloud.com/flickadawrist-574771786/white-noise

My microphone is Neewer NW-700, which is connected to my Xonar u7 sound card.

 

[aminothebambino]

And also, i do know the mic works better with a phantom power supply, but i don't know if it's the soundcard that's broken or the mic.
Don't wanna spend any unnecessary money.