Athena Power AP-MP4ATX40 400W 20+4 pin SFX mATX PSU w/PCIe/SATA NEW The APOLLO 400 is a 400 watt high efficiency SFX power supply. This power supply is compatible with many eMachines, HP PCs for power supply replacement and Replacement Partsystem HTPC, Micro PCs. Lan Station, assembly, and it supports 20 pin or 24 pin ATX V2.2 mother