<<In the 4 years of running 130 Dell Optiplex's, I have 2 hard drive failure, 1 monitor.>> These were Acers. The Dells I have are flawless and nary a failure among them. I am leery of running anything 24/7 unless it has the Dell nameplate on it for that reason. Only time one of the Dells has quit was when I did something stupid...like downloading a virus <ahem, who me?> :). Ron