Use your creativity to create this pictorial view and give some legend for the pictorial components you select in Visio. Say
Rectancgle for Box
Square for Database
Circle for Total memory on the box

Its not that hard if you would have used visio before. you can type in the text details on that particular Square or whatever.

Just I mentioned idea on how to go about.... its your creativity how better you draw and how much detailed info you can provide... on that chart.