The SR63 V2 server has up to eight 4 mm dual-rotor hot-swap fans, and the fans are N+1 rotor redundant. The fans are dual-rotor counter-rotating units, which means that the fans have two separate propellors, one in front of the other, and that the propellors rotate in opposite directions. Six fans are needed when one processor is installed and eight fans are required when two processors are installed. The server also has one additional fan integrated in each of the two power supplies.