Open up the computer’s case ... to large axial fans used in most power supplies. The most common fan sizes fall in the 70mm to 140mm range, but fans as large as 230mm are becoming more popular.

The Silent Power PC is claimed to be the first high-end PC ... At just 160 mm (6.2 in) wide, 100 mm (4 in) deep, and 70 mm (2.75 in) tall, the case is very compact – without its bouffant coppery ...