A capture card is a device that can be used to record what you see on your monitor or take in-game footage. There are two different types of cards: external capture cards with USB connections, and internal PCI-e based versions found inside many laptops these days. USB capture cards are great because they can be taken anywhere. However, if you want to use your card only with a desktop PC then go for the PCI-e interface. However, PCI-e capture cards are free from bandwidth limitations that are common with USB external capture cards. This is because bandwidth limitations will limit the capabilities of USB interfaces on laptops and mobile devices which have less processing power than traditional computers