ma la cosa piu' bella e' questa:
It is important to note that not all PFC power supplies will cause the UPS overload. However, the incompatibility is most acute in the one of the following situations:
• A large server class PFC supply (e.g. rated 500W or more) is used with a Back-UPS or Smart-UPS SC.
• The server is equipped with redundant PFC supplies (has two line cords) that are powered by the same UPS.
• More than one PFC supply is plugged into the same UPS, bringing the total power rating (nominal) of the power supplies to 500W or more.
• A workstation class PC (or high-end gaming PC) is equipped with a PFC power supply rated 500W or more.
praticamente ti dicono che le incompatibilita' sono piu' probabili con l'onda approssimata e che le loro serie Back UPS e Smart UPS SC fanno schifo
