I have a SuperServer 5013G-I (P4SGE) with 250watt Power Supply, but the motherboard specification recommends a 300watt minimum power supply. Which is correct?
There are two answers to your question.
1. For the Super Server 5013G-I level, the 250watt power supply is enough to run without any issue due to no AGP video card support.
2. For the motherboard specification, if the motherboard are using in desktop level that is add more then one PCI cards or use AGP video card then is require a minimum of 300watt power supply require with 4pins 12v connector.