USB Headset compared to Jack Headset?

I've read that with a USB headset it can be treated as a 2nd soundcard, allowing music to be played through your speakers and say voice chat played through your headset.
Is this only allowed with USB headsets or can I use it with a headset with the 2 jacks?

In my experience, using a USB audio device doesn't act as a SECOND sound card, but instead, it overrides your own sound card and acts as the sound card in its place. Either way, it would never work with one of those 2 jack form factors. You just can't always get what you want Ezethal, you're just going to have to deal with the fact that you gotta use either the speakers or the headset.