I bought this item, and (paid too much for it elsewhere) but when it caused problems to my computer, I found out that no one supports it except the manufacturer. (siig)Sigg Support (only reachable online, where you have to log a problem with their internal system) still took too much time to get back to me, all the while this firewire card is causing error messages, and not allowing my computer to power down...Finally, they got back to me (over a week later) telling me to pull out my modem card (that came with the computer) to avoid error messages.I'm returning it and getting an adapteac.