AMP/DAC/Sound card for microphone hiss?

[JonasPoint]

Hello!

I do a lot of recording of games but I have a slight problem with my microphone audio as it generates a very slight hissing noise when I press my PTT without talking (which isn't an option for high quality video!). I have fixed this in the past through VSTHost with plugins which then outputted my microphone audio to a Virtual Audio Cable but this created problems with the recording as DxTory when I started using a PTT on it as without the PTT I had to do way to much editing on the audio. However DxTory does not allow for a release delay on your PTT so it always cuts out the last half a second of what I say.

I want this resolved and after talking to some people I was suggested that it might be my computer causing it? I have a 10db boost on the microphone because even at 100% everywhere it was too quiet... So Could anyone please suggest a (hardware) solution for this problem where it either gets rid of the hiss with the boost on or allows me to boost my microphone audio the right way so that no hissing is generated?

My setup:
Headphones: Sennheiser hd 558
Microphone: Modmic 4.0 uni-directional
Motherboard: ASUS Z97 pro (which advertised isolated & high-quality audio?)

Thank you!

 

[WyomingKnott]

I can't answer, but I can suggest a few tests.
1) If the PTT switch is not on the mic, try this with the mic disconnected. If it hisses, it's in the PC
2) Try this mic on a different machine. Try a different mic on this machine. If the hiss moves with the mic, it's the mic.
3) If you have a stereo extension cable, plug it in and see if you get the hiss. If so, it's the wire picking up EM noise.