This 4U GPU Server chassis modified from R415 supports standard rear I/O rackmount installation for all SI clients. 

Application: GPU Computing Server

Key Features:
Dual Intel Xeon processor in proprietary MB
4 x dual-slot GPU Card
3 x normal PCIe Card
1 x 5.25” bay on rear panel(optional)
Rackmount ear brackets on rear panel
1+1 Redundant PSU

Spec: 
Chassis Material: SGCC Sheet Metal 
Form Factor: 4U Rackmount with Proprietary MB 
Power Supply: 1+1 Redundant PSU 
Drive Capacity: 1 x 5.25” bay on rear panel(optional) 
Expansion Slot: 4 x Dual-Slot GPU Card;3 x Normal PCIe Card 
Cooling Fan 3 x 120*120*25mm Fan 
LED Indicator: Power on, Reset, 2 x LAN 
Button: Power, Reset 
Dimension(DxWxH): 550 x 440 x 177mm