3U Standard Chassis 14 x 3.5\" HDD (Optional 9 x 3.5\" HDD + 3 x 5.25\" Bays) ATX PSU. The SC-39650G-ATX is a cost-effective and industrial grade high quality rackmount chassis. It supports 14 x 3.5\" drive bays and accepts EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), Mini ITX (6.7\" x 6.7\") motherboards. RoHS Compliant. It is perfect for A/V system, DVR, Home Theater server and corporate server Features: 3U rackmount design,meets EIARS-310C standard. 14 x 3.5\" drive bays (The 4 centre drive bays can also accept 2.5\" HDD / SSD\'s) Can be modified to have a variety of hot swap drive bays, internal 3.5\" HDD and 5.25\" optical bays using SC-H300 and SC-H500 Caddy\'s Alterntively can have 3 x 5.25\" and 9 x 3.5\" HDD internal bays Supports EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (12\"x9.6\"), ATX (9.6\" x 9.6\"), Mini ITX (6.7\" x 6.7\") motherboards. 5 full height PCI slots 2 x 60mm rear exhaust fans, 4 x 80mm hot swap fans in centre fan wall plus 2 x 120mm front fans. Two front accessible USB ports RoHS Compliant Specifications: Drive Bay: Supports fourteen 3.5\" drives (The 4 centre drive bays can also accept 2.5\" HDD / SSD\'s) Alternative 1 - Can be modified to have 10 x 3.5\" Hot Swap, and 4 x 3.5\" internal using the SC-H500 Caddy Alternative 2 - Can be modified to have 8 x 3.5\" Hot Swap, 1 x 5.25\" and 4 x 3.5\" internal HDD using 1 x SC-H300 and 1 x SC-H500 Caddy Alternative 3 - Can be modified to have 9 x internal 3.5\" HDD and 3 x 5.25\" Optical drive bays. Convert any of the 3.5\" HDD drive bays to accept 2 x 2.5\" HDD / SSD by using an SC-02A drive converter. Add 2 extra 2.5\" HDD/SSD internal drives using internal drive carrier SC-BKT-006 Cooling Fan: 2 x 60mm rear exhaust fans, 4 x 80mm hot swap fans in centre fan wall plus 2 x 120mm front fans. Switch: Power ON/OFF x 1, System reset x 1 Indicator:Power ON/OFF x 1, HDD x 1, NETWORK X 2 Connector:Two front accessible USB ports Motherboard Compatibility: Supports EEB (12\"x13\"), CEB(12\"x10.5\"), ATX (12\"x9.6\"), Micro ATX (9.6\" x 9.6\"), Mini ITX (6.7\" x 6.7\") Power Supply Options: Standard ATX (rear mounted) must have 80mm fans. PCI Expansion: 5 x full height PCI expansion slots Dimensions ( W x D x H ): 19\" x 25.6\" x 5.1\" (483mm x 650mm x 133mm) Packing:Double boxes, 830mm x 555mm x 195mm (33\" x 22\" x 8\") Weight: 11.60 kg/23 lb (NET) 13.50 kg/ 27.3 lb (GROSS) Environment Temperature:0/55 C, 32/131 F (Operating) -20/60 C, -4/140 F (Non-Operating) Relative Humidity: 5% to 95%,non-condensing Vibration ( 5-500 Hz ):1 Grms (Operating), 2 G (Non-Operating) Shock : 10 G(with 11ms duration, half sine wave) (Operating), 30 G (Non-Operating)