I purchased the HyperX Cloud II headset, and since the 3.5mm cord isn't long enough to reach the PC, I used the 3.5mm/USB adapter to get it going. Windows recognizes it as HyperX 7.1 Audio (Generic USB device).
Every time I pressed the transmit key the game would freeze for a fraction of a second. Every time I'd release the transmit key, the game would freeze for a fraction of a second. This was 100% of the time.
When using the onboard Realtek soundcard, which uses the 3.5mm jacks, I do not have any freezes related to vox.
Passing the info along for you guys.