I expect that your printer cable
is a proper USB cable*!
However, if it makes you feel better, buy a branded cable (eg Belkin) from a computer shop or online supplier. Disclosure: this is exactly what I intend to do for my DAC sometime soon, even though the cable supplied with it is probably up-to-spec.
Or... you can go the
audiophile USB cable way, where the sole purpose is giving your money away. Of course, if that makes you feel better, then spend away
I recommend the Belkin. And hey, you can even use it for your printer!
Doesn't matter. All that matters is that it is properly made, properly terminated, and has the
right plugs on each end. What DAC you are connecting matters as much as what PC you are connecting: which is not at all.
*It's also possible that it came out of a Chinese factory where they didn't even bother to read the spec. Branded is the way to go.