I don't think that Promise card was designed for any Mac. It's DOS 5.X, Windows 3.1/95/98/ME, Red Hat Linux 6.2/7.0,and Netware 3.12/4.1X/5.0 only. http://www.promise.com/product/datasheet_list_eng.asp Brian Conner -----Original Message----- From: Power Macintosh G4 List [mailto:G4 at lists.themacintoshguy.com] On Behalf Of jrs Sent: Sunday, March 30, 2003 11:10 AM To: Power Macintosh G4 List Subject: [G4] 2002 quicksilver (Mar 2002) - adding second hard drive Great to know about the requirement for the ATA 133 card so I can access the entire 200gb in my new and soon to arrive hard drive. Thanks so much for the feedback! The drive apparently ships with a controller card that allows me to access the entire 200gb. The drive transfer rate with this controller card is limited to 100 megabytes per second as opposed to 133 megabytes per second with an ATA 133 card. Question...Will my Quicksilver 933 mhz machine (purchased in 3/2002) support transfer rates as high as 133MBS? If not, I'll simply use the controller card (Promise Ultra-100TX2) that ships with the hard drive. TIA