With testing amd64 I installed Xfce a few months ago. I can now say that, for scientific use of the computer, I found Xfce far better than its father, GNOME. First, Xfce does not take possession of the computer. Second, I can run preliminary molecular dynamics with CPU-graphical boards from Xfce. That was not possible from GNOME, which took a lot of RAM and, worse, gradually eated up all RAM. With GNOME I had to run MD without the X-server, a slower doing in trial MD, to prepare the system for the mainframe.I only have to check whether gchempaint (a drawing tool for small molecules) works with Xfce. That is needed.regardsfrancesco pietra