It should work. Doesn't the person who's building your PC know? If it was my PC that they were building, I would expect them to already know this type of thing.
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Try asking this at computeraudiophile.com or at the PCaudio forum in the JPlay website. I know people there use this combo.
FWIW, I use a PPA v2 USB card with WS2012 without issues. I built my server 15 months ago and don't even remember if I needed special drivers.
BTW, I assume you have asked the manufacturer, right?