The ARCTIC HC 01-TC is a hard drive cooler for 3.5” hard drives. The 514;” case incorporates the drive & isolates it with absorption foam, so that no noise is transferred from the drive to the case. A temperature controlled 40mm fan helps to cool the drive. Advanced Temperature Control Function The ARCTIC HC 01-TC employs temperature control technology that measures the temperature of the hard drive & controls the fan speed automatically – the warmer the hard drive gets, the faster the fan spins to dissipate the emitted heat. Virtually Silent The ARCTIC HC 01-TC is a single cooling frame for hard drive that isolates it from vibrating with the chassis. This cooler also features absorption foam to eliminate vibration, spinning & excess noise of the running hard drive. The fan remains virtually silent at most times as the maximum fan speed is only activated when the hard drive is above 47°C. Lowering noise & the temperature at the same time Thanks to the combination of absorption foam & the temperature controlled fan, the ARCTIC HC 01-TC not only lowers the noise emitted from the hard drive, it also lowers the temperature.