Does this make sense, or am I not looking for the right thing? I am looking for a controller card to add a new ATA/IDE hard drive to my G4 400 AGP Mac. I have two drives installed now (a 30 gig that I added, and the 10 gig that came with the G4). When I search for controller cards I get prices as low as $23 for PCI cards for a Windows machine, but they start at $94 for a Mac. Is there a difference, and does the price make sense? If these prices are accurate, I will just replace the 10 gig with the new 100 gig that I bought.