Luis, I'll attach my system profile report off list. All ports work as normal - I am backing up to a LaCie Firewire disk, no problems. USB sound inputs / outputs OK. I checked using a USB hub just to make sure - that was OK, but I do not normally use it. No problems with Airport. I have a DVD writer (internal) it writes CDs OK, I haven't checked for DVD writing. System Profiler recognizes the chip and its speed. The OS9 patch seems straightforward: select the patch on the firmware installer disk after installation of the new chip, and restart. That's it. My UMAX Astra 6400 (FireWire) scanner works as normal. Zip disks 100/250 OK Synchronizes Palm with iCal, Mail, etc all OK. No file corruption detected. As I said earlier, I no longer need to boot into OS9 so I have not implement the boot patch - but Classic works fine - I use it when I want to open some large complicated documents written in Nisus 6.5 - their OSX version is not yet up to all the facilities used in the old version! No problems - but Classic loads very quickly! David. On 30 Sep 2004, at 12:23, Luis Meleiro wrote: Basically, I would like to know if you've already performed hard testing with the Cube's hardware components, such as USB and FireWire ports. My PL was working OK except for the FireWire connections, where a write/read from external and internal hard disk drives would lead me to corrupt every single hdd attached to that chain. Plus, what is your info in System Profiler? Does is recognize the new CPU? Do you still run Mac OS 9? Is the patch complicated to apply or is it somehow risky?