About a month ago my Powermac G5 quad started randomly freezing and/or having a 'kernel' panic. After reinstalling the OS, it paniced again when communicating with Apple to retrieve my personal details upon first boot. Since then I have fitted a new internal Hard Drive, changed ram, repaired permissions, reset pmu, zapped pram, etc. It still panics or freezes at random times, sometimes after an hour, sometimes several. At the weekend I wanting to encode some family video and 8% in to the export, it went again - freezing, panic, fans on full. A second try failed after 4%. I then decided to disconnect the ethernet cable from the router and reboot. The rest of Saturday and most of Sunday was spent encoding the videos and generally 'stressing' the machine as much as possible which DIDN'T cause a single panic. So I wonder. What do you guys think this means? Is it my router? Is it the Ethernet port? The Router is a Netgear DG834G. Any pointers would be greatly appreciated.