A few suggestions.
First, you could read this:
http://www.tomshardware.com/forum/196922-32-switching-s... . It's a stickied article on switching RAID controllers.
Second, that's a PCI card, and many modern motherboards support PCI slots. In theory, you can plop it down into a new machine and have it run. It might be slow compared to a single SATA drive, though.
Third, as I said above, a PCI card might be slower than using the SATA II ports; PCI is pretty slow these days.
Some questions so that I can give a better answer: Why are you using RAID? If you are using it to increase capacity, there are 3 TB drives now. If you are using RAID1 or 5 or 6 or something to improve reliability, you can use this nifty device that FireWire2 has used with 40 TB of storage (well, he has four of them):
http://www.datoptic.com/esata-hardware-raid-controller.... . I think that that's the link to the external version, there is an internal version. It will RAID up to five drives and plug into a single SATA II port on your mobo.
If, however, you are using RAID for speed, then you have to look at either a more expensive card (see Tom's recent article on the 3 GB/sec project) or a ginormous SSD.
So, what is your goal here?