Sure it can still do useful work, but I wouldent waste my time with a box like that. Same as using a dual g4/single/dual g5 as a server, way to expensive in power usage. But that's just me, where I live the power bill is more than 300nz dollars a month, that's around 300 us a month.. Adds up for the year..g5 for server, on 24/7 ??? No thanks... Even if it's the crappy single 1.6.