Plug in to tower jack plugs or sound card?

[Michael Willis]

Hi all, question here.. I have a high end sound card, I also have decent headphones.

If I plug the headphones into the USB or jack plug on the tower, will I be listening to the on board sound or sound from my sound card?

To get sound from the sound card do I have to plug directly into it?

Also my headphones have a USB or a small jack plug, which is better?

Thanks
Mike

 

[Michael Willis]

Thanks for the reply that cleared up my queries