Lenovo ThinkSystem ST650 V2 Performance Fan Kit (dual-rotor fans)

The ST650 V2 server has up to 4x hot-swap 92 mm fans, either Performance or Standard fans, depending on the configuration. Performance fans are dual-rotor counter-rotating units that have two separate spinning fan rotors, one in front of the other, which rotate in opposite directions. Standard fans are single-rotor units. Performance fans are N+1 rotor redundant and in the event of a rotor failure, the system will continue with no loss of performance provided the ambient temperature is 27 °C or lower. If the ambient temperature is above 27 °C, performance may be degraded. Standard fans are not redundant, and in the event of a fan failure, the server will continue however performance will be degraded. The server also has one or two additional fans integrated in each of the two power supplies. Depending on the configuration, Standard fans will be sufficient to provide the necessary air flow, however for CTO orders it will be possible in the DCSC configurator to override the default selection and select Performance fans. Fan types cannot be mixed. Ordering information : ->Qty required : 1 CPU : 3 or 4 2 CPUs : 4 The use of 4x dual-rotor fans supports all configurations