Mic phantom power noise

[THEPASHKA]

So, when i'm using my microphone it needs phantom power from USB and when i use USB ports on my motherboard my mic recording have loud noise and when i use power bank as a phantom power the sound is crystal clear. I've heard that you need to ground pc to fix that so is that what i need to do or there is other fix?

My mic is have a 3.5mm jack for sound and usb for power.

P.s. i cant always use power bank because mic take so little power that power bank goes to sleep in 3 min.

Motherboard: Z370 AORUS ULTRA GAMING 2.0 OP

PSU: EVGA 500 UK Plug

 

[TheBean]

is your desktop power supply 3 prong or 2 prong?

[THEPASHKA]

Just now, Saksham said:

is your desktop power supply 3 prong or 2 prong?

3 and connected to the wall socket no extension cords

[TheBean]

what mobo?

[THEPASHKA]

1 minute ago, Saksham said:

what mobo?

Mother board?

Z370 AORUS ULTRA GAMING 2.0 OP

[TheBean]

is this a new mobo?

[THEPASHKA]

Just now, Saksham said:

is this a new mobo?

Yes 3 month old, i had same problem with old one but it had less noise and BIAS Sound Soap Pro was managing to make it less loud

[TheBean]

if it is still under warranty, RMA it and tell them you had this problem twice now.