How to tell if my soundcard needs an amp?

[BmoneyGames]

Im planning on getting the ath-m50x headphones and i wanted to know if i could tell how many ohms my card can output to determine if i need an amp.

 

[RazerZ]

Which soundcard do you have? They are fairly low impedance and should be easy to drive across a variety of devices.

 

[BmoneyGames]

Which soundcard do you have? They are fairly low impedance and should be easy to drive across a variety of devices.

NVIDIA Virtual Audio Device