I know a DAC will give me better audio quality, but will it also improve my mic like a sound card would? The mic I am using is a Zalman ZM-Mic1, which definitely needs some upgrades in the sound quality. I'm deciding between the Xonar DGX and the Fiio E10K. 

I'm planning to get a Xonar DGX sound card to put in my PC, but do not know if it will fit.  Check out these photos.    with  graphics card without graphics card

I'm new to this forum and high quality audio. I don't have any room on my motherboard for a dedicated sound card. How can I improve the sound and mic quality for under $50 without buying new speakers, headphones, and mic?

Hi! I'm not an expert at all so please bare with me. I recently wanted to get a new pair of headphones because I realized what I have now is pretty garbage. I don't have the money to go and buy myself the best headphones out, but any thing under $200 is good.    Requirements: -under $200...