Thanks for writing. I'm already aware of the 5V and 7V mods for slowing down case fans. I actually use an MCubed TBalancer BigNG in my main rig, which is a microprocessor-controlled, software-programmable fan control unit. In my last machine, I ran three 80mm Panaflo low-speed fans at 5 volts by tapping into the PSU's 5v rail. In an upcoming article, I'll be tackling the subject of PC silencing in a much broader way, covering the reason for silencing, the most common PC noise culprits, silent component suggestions, and additional tricks like the 5V and 7V mods. I personally recommend using a fan controller like the Zalman Fan Mate 1 if you can afford one (they're cheap), since it's a more 'elegant' solution than re-wiring the power connector. In addition, if you've got a three pin fan (like the AcoustiFan), a fan controller doesn't require you to cannibalize a 4-pin power connector from another device.