It's really simple: the DVX has a 4 pin firewire port, your PC has either a 6 pin or a 4 pin FW port. Buy the version that matches. If the comp doesn't have an FW port, you need to buy a firewire card for it. Any brand is fine; you'll see brand like Monster that triple and quanruple the price claiming theirs is "special" and you get a better image quality. It's BS.