My PowerMac is 867mhz, I think that's a QuickSilver. Anyway, I ordered a Maxtor 250GB internal hard drive. Now that I have the install guide, it says that to access a drive larger than 137 GB, I need a Mac-compatible Ultra ATA/133 PCI card (that info would have been more useful before I ordered). Anyway, according to MacTracker the QuickSilver has an Ultra ATA/66 hard drive bus (which I assume is the same thing as a PCI card, but I really don't know). So will my nice new hard drive not be recognized as 250 GB? Would it be worth it to add an Ultra ATA/133 PCI card? Thanks for any help.