Athena Power AP-MP4ATX40 400W ATX12V / MicroATX / SFX12V v 2.2 SLI Ready CrossFire Ready eMachines, HP Upgrades/Replacement Power Supply Fans: 2 Main Connector: 20+4Pin +12V Rails: 2 PCI-Express Connector: 2 x 6-Pin SATA Power Connector: 3 Over Voltage Protection: Yes Input Voltage: 115 / 230 V Input Frequency Range: 50/60 Hz