MasterGauges - Version 1.9a A great screen saver with stunning graphics, its also a great utility for monitoring your system. It monitors your computer's three most important system parameters while the screen saver is active. It monitors the amount of hard disk space used, the real memory used, and the CPU usage (or utilization). MasterGauges uses a great analogy that many people can relate to for displaying these parameters. It displays the information in gauges similar to a car’s dashboard.