It's a device that sits in one of your drive bays with one or more dials, allowing you to control the speed of the fan. You might have to get certain ones for the Vantec Tornado, like the Vantec controller since these fans really spin at high RPM's for 80MM and 92MM fans.
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||DFI UT P35||Q9550@3400 Mhz||Geil 4GB RAM||Radeon 5770||