Supermicro CSE-216BE2C-R920WB

2U Chassis for motherboard support size: (ATX 12" x 10") (E. ATX 12" x 13") (E.E. ATX 13.68" x 13");
24 x 2.5" hot-swap SAS/SATA drive bay, optional 2 x 2.5" hot-swap drive bay;
24-port 2U SAS3 12Gbps dual-expander backplane, support up to 24x 2.5-inch SAS3/SATA3 HDD/SSD;
1U 920W Redundant Platinum Super Quiet power supply W/PMbus;
WIO Slots (4x Full-height, Half-length + 3x Low-profile);
3 x 8cm high-performance PWM fan(s)