Krutsch
Headphoneus Supremus
I only get noise from my stationary PC. Ive tried getting new PSU, changing ports etc, no success...
Laptops doesnt give me any noise with USB tho...
That could be so many different things; hard to know where to start. Could be a bad ground, a bad motherboard, a defective USB port, interference from a video GPU, who knows.
One thing you could try, if you want to stick it out with the same PC: try a USB-to-S/PDIF converter (a quality one) that will provide true galvanic isolation from the computer. Then, run the coax out from the converter into your DAC and you might to good-to-go.
Does your PC have a sound card with optical out? That would work, as well.