Hi,
I’m working right now on a feature-length DVC PRO HD documentary on a three-year old G5 1,8 single processor and the editing works perfectly fine. I installed a SCSI-card and a 1,5 TB RAID in order to store the files. I did some viewing on Firewire 800 disks as well which also worked, after all, with DVC PRO HD you only have a data rate of 100 MB/s.
Best regards,
Volker