How to properly connect my USB gaming headsets with a 3.5mm jack to the SoundblasterX G5?

[manilow2k6]

Have 2 gaming headsets with a USB connection and a 3.5mm jack--how do I properly connect them to the SoundBlasterX g5? (Logitech G533 and the SteelSeries Artis pro)

 

[Alabalcho]

USB headsets have their own integrated soundcard, so your SoundBlaster is of no use. There is no "easy" adapter for 3.5mm IN -> USB out (and you want it double), and no easy way to connect both headsets to same PC, and have them produce same sounds (unless you use something like "virtual audio adapters").