Christopher, There's a 3 Gb drive inside when delivered, I've another 3 Gb from a G5 and a non 3 Gb also from that G5. I've enough drives, I just wanted to know if it would arm to install it as thew third drive. And I already have an external drive for backup. Paul Moortgat On 17 Jun 2008, at 14:21, Christopher Collins wrote: > Paul, > > With the price of SATA-II hard drives these days, is it worth > hampering the performance of your Mac Pro to save a few dollars? > > IOW, you spent the money on a Mac Pro, so why limits it's > performance by installing slower disks? > > Use them for external backup drives. > > cjc > > > On 17/06/2008, at 10:03 PM, Paul Moortgat wrote: > >> In the Mac_Pro_Early_2008.pdf file is written on page 51 to use 3 >> Gb/s HD drives. >> Shouls it be a problem to install older non 3 Gb/s drives? They >> might run slower, but will it cause problems? >> I've still some of these. >> >> Paul Moortgat