I installed the 10.5.2 Rev 1 on a WD 320gb SATA2 drive with no problems on a DFI Lanparty Ultra-D with Opteron 170. Just remember on a new drive you must partition and Fdisk to make the partition active. Installs perfectly for me with no problems. Time Machine works, network works, video works with no patches. I use a NVidia 6600GT 128MB card. The Rev 2 version had some network issues so I use Rev 1.