I run 4 comps, all p4s,3 gig ram, my main system(Purple Passion) has 3 dvd burners and 4 160 gig HDD and 1 80 gig,2 video capture cards just to start it off... 2nd system(Big Red), dvd and cd burners and 2 80 gig HDD, 3rd(Shadow), 2 dvd burners 2 80 gig HDD,and 4th (Blue Eyes) runs the security system, and has 1 80 gig and 2 500 gig HDD and 4 CCTV cards. all custom built. all networked wiht 8 port router, also includes my wife's compa Dell, a ps2 and X-Box... any way not a one has less than 5 fans, not including the CPU fans, granted I have them all on max or close to max speeds, and could turn them down and reduce the noise, but they are running a bit cooler than the avrage system. the normal everyday computer and person dont do what I do with my systems, so I need the extra power and air flow cooling, so I said very noisy for the poll but for me, if its not noisy, something is wrong...