Black Magic Intensity Pro questoin..

I'm considering buying a new capture card and I was looking into this:
http://www.blackmagic-design.com/products/intensity/

It's the only cap card I've found so far that supports HDMI.. I'm very keen on getting a top of the line card. My only problem is my computer only has one PCI Express slot, which is currently taken up by my video card (Radeon x1650 PRO 512MB)

I have an integrated GeForce 6100SE which really sucks ass but I can deal with it if it can handle that capture card.

What do you guys think? Like if I turned off the preview window and everything to make the workload on my PC a lot easier? I'd really prefer this over the Hauppauge HDPVR because it's waaay better quality (HDMI ) and somehow remains cheaper..

 

I'm actually sort of interested in buying a similar capture card, I had looked at the Blackmagic but there are somethings about it that was un-sure of.
As for your problem, if you don't mind switching everytime you record, then you should be good.