Short answer: Yes.
Sound quality, difference in sounds, direction, clarity. It will all improve with a sound card.
Also remember the quality of your headphones will come in to play, if you have low quality headphones, the sound card won't make that much of a difference. ALso, USB headsets will not use the sound card.
Your English is fine.
However, I have never even heard of that sound card so I'm not sure if it is any good or not. I recommend ASUS Xonar DX. Great sounding card at a good price that is right around your price range, maybe less.
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