I could be wrong about this, but I think you have to have a PCI-X slot to use it. (least I hope you do, I spent way too much money just to get that...) I haven't really finished testing its performance yet... I should load up an old raw NTSC AVI file and see if I can view it full speed now. I do know that I have a 3Ware Escalade 7506-4 installed with four 200G drives on it, and I had the Premiere install files located on that array and installed it to the Raptor array... Premiere installed itself in 5 seconds! I've had one person badmouth the HighPoint cards, saying they are crap and fail early, but he didn't have much to back it up with other than "someone I knew had one and it failed", and then he recalled that the PS blew up in that computer, and so did the video card, motherboard, hard drive.... so I don't know how this will turn out yet.
Right now, I'm wishing I had a gamer motherboard with PCI-X slots on it, because if I did, I could install my games across the network to the Raptor array, and by Sandra benchmarks I would get 100MB/sec from across the network for level loading. Unfortunately, a normal PCI gigabit ethernet card peaks out at around the transfer rate of a normal PATA hard drive, so unless I had a PCI-X gigabit card in the game system it would be pointless. (I'll just have to put up with loading levels at 1X speed... I'll miss having raid on my gaming rig.)
The enclosures are very nice. They have individual access LEDs for each drive, can be locked in place, and best of all if you work it right you can eject a hard drive while windows is running and put it in another system, or even put a HDD you want to do something to (like scan, or format, or maybe even install windows to) into a hot-swap bay, do your thing, then carry the drive back to your gaming rig and put it back in. One word of caution, the hot-swap bays are very long. My case kind of sucks on multiple fronts, but I had to actually get out the drill press and drill custom holes in the drive cages for these bays so that they could stick out the front and avoid running into the motherboard. That's partly because I have an EATX mobo too though. Some enclosures have fans built in to the back of them, especially SATA enclosures, which is nice. I've spent a lot of time looking for these things, and been through two brands now, so if you need some I can help you find them.
My recommendation, if you're building a gaming rig... get one with one of the new chipsets that supports P4 and PCI-X, or maybe a single-proc Opteron system, for that crazy memory bandwidth it has, and you will be able to take advantage of your RAID speed from anywhere in the house you plug in, long as you have gigabit hardware for it. (but of course don't sacrifice CPU power to get it - that's more important than faster level loads.) And don't do PATA RAID. I've completely given up on it. I wish I had never bought those PATA drives that are in my RAID-5.