How do you identify gigabit ethernet models of the G4 cube?
I was thinking of using one as fileserver, but on a 200mbit connection I assume the speed will be cut in half with a 10/100 ethernet port?
My understanding is that only a handful of Cubes were manufactured with a gigabit card, and then only as a prototype. Way back when, on Cubeowner, I heard of a couple. I don't fancy your chances of finding one.
Sorry to say this but most if not any will have gigabit. Ideally the cube is not a server. Perhaps you could sell this and use the money to buy a more suitable one. If you have your heart set on it I am sure if you are really confident in your DIY there is some sort of MOD. Look it, I use a usb dongle for my macbook air that is 10/100 or whatever and it is really quite fast.
The most uncommon thing here is that you have chosen the least practical Mac ever made to use as a file server. The aesthetics of the Cube will do nothing to help anything but your eyes and you will be handed a whole list of limitations that come with it. This is the side of the Mac community I have never liked. Regardless of how pretty a plastic box is you still need to use it as a tool.
You would honestly be better off just buying a big external HD. I recommend you get a high res pic of a Cube printed for your wall and buy a Powermac G4 for a file server. It will be half the cost or less and far far far more practical. The Cube is a gimmick product. Period.
Ok maybe file server is the wrong word. I need something not too big, fanless, to download lots of files, and I'm not sure a NAS with bitTorrent is easy enough to manage. The Cube would also be used to feed files to the AppleTV.