Quick overview from the supplier:
Power Supply ATX 2U Rackmount 400W Seasonic SS-400H2U, 80PLUS, Bulk
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80PLUS®
Type Active PFC
Form Factor Intel EPS1U V2.1 AND ATX 12 V V2.2
Dimensions 225 mm (L) x 100 mm (W) x 70 mm (H)
Fan size 60 mm
Fan Control Seasonic S2FC (Smart and Silent Fan Control)
Fan Bearing Double ball bearing fan
Cable Modularity Fully Modular
MTBF, full load @ 25 °C ambient (excl. DC fan) >100,000 hours
Protection OPP, OVP, UVP, OCP, SCP, OTP
Power Output
+3,3V: : 20A
+5V : : 21A
+12V : : 29A
Cables
20+4PIN ATX: : 1
4+4PIN 12V: : 2
SATA: : 4
MOLEX: : 5
8PIN (6+2) PCIe: : 1
https://seasonic.com/h2u
