Synchronization with Decklink Duo

Hey everyone!

We are considering to purchase a Decklink Duo Capture Card. Since we will be recording from 2 imaging sources, I was wondering if there is a way to synchronize the two streams with the Decklink Duo

Thank you!

Or would we have to purchase the Decklink Extreme 3D to synchronize the two streams? To elaborate: the two streams are from two cameras in a stereo setup