Lenovo ThinkSystem SR650 v2 Standard 1 x Fan Option Kit 4F17A14497

The SR650 V2 server has up to six 60mm hot-swap fans. Five fans are needed when one processor is installed and six fans are required when two processors are installed. Fans are N+1 redundant, tolerating a single-rotor failure. The server also has one or two additional fans integrated in each of the two power supplies.

Depending on the configuration, the server supports one of the following:

• Standard fans (single-rotor, 17K RPM, 60x38 mm)
• Performance fans (dual-rotor, 19K RPM, 60x56 mm).

The performance 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.