I have been running, very successfully, Cat4 Pro. I get about 4 layers of video before any stutter. Able to drive artnet. Macbook Pro 2.0Ghz, 2GB RAM. Let me know if you have any questions.
i am looking at the 17" w/ 2.16ghz. what is your setup with the artnet? what console is driving your system? are you using the DVI output on your laptop with only one output? please explain your setup.