Used PWS-406P-1R 400W Redundant Short Depth Power Supply.
Efficiency: 80Plus Gold; 92%
Dimensions: 54.5 mm x 220 mm x 40 mm
Maximum output power: 400W
Redundancy: Hot-Swappable, N+1
Reliability: Greater than 250,000 hours at 25C
Special: PMBus 1.2 compatible; FRU data.