Webcams

[kilerb]

Hello, I am going to start a live webcast with 3 C920 camcorders if possible.  Had 2 questions...

1.  Will there be any sort of conflict with Windows 7 in finding all 3 separately?  Any issues with multiple cams?

2.  I was told adding 3 USB cards to my computer would be the most efficient way to handle this scenario.  Assuming the computer can handle 3 cams, would it be advised to use them on a separate card each while streaming?  Or can I just plug them into usb ports on the computer?   

Thanks!