M/B Form Factor "Proprietary (15.12” x 13.2”): SMC X11DGP-QT/X11DPX-T Proprietary (14.23” x 13.24”): Tyan S7105 SSI EEB (12”x 13”): 8-slot SKU only" Dimension (D x W x H) 680.0 x 438.0 x 175.0 (mm) ; 26.77" x 17.24" x 6.89" Drive Bay "External: 2 x 5.25” and 1 x 3.5” Hot-Swap: 2 x 4-Bay 3.5” SAS/SATA HDD module" Storage Backplane 12Gb/s, miniSAS HD connector PSU Form Factor "Redundant CRPS 1+1,2000W (80+ Platinum) CRPS PDB + Housing " Indicators 1 x Power Status, 1 x HDD Activity, 2x LAN Activity Front Control 1 x Power On/Off, 1 x System Reset, 2 x USB3.0, 1 x Audio combo Cooling Fans "Middle (Default): 4 x 80 (mm), PWM, 11000 RPM, Hot-Swap Rear CPU fan module for internal: 2 x 80 (mm ), PWM, 8200 RPM, Fixed (Option) Rear GPU hot-swap fan for external: 2 x 80 (mm), PWM, 11000 RPM, Hot-Swap (Option)" System Security Intrusion Switch (Option); Key lock on front bezel (Option) Expansion Slot "8 x Full Height and Full Length (Up to double width 4-GPU support) " Supported rack mount kit (Options) "- Rackmount ear handle - Slide rail kit with CMA support: Works for 438 mm width rack chassis, P2P: 26"" to 36.7"", Traveling Distance 28.5"", maximum load weight: 59KG, Tool-less "