User guide
RM312 User Guide  1  19" Rackmount Chassis 
YOUR RACKMOUNT CHASSIS 
The RM312 19" rackmount chassis supports a variety of high-density system 
configurations and features the latest in server-chassis technology. 
Features 
Top Cover 
Ø Screw-less design for easy installation and maintenance 
Ø Quick reference guide affixed to the inside 
Front Panel Controls and Indicators 
Ø Front access USB2.0 ports offer flexibility 
Ø Alarm mute button to disable audible warnings 
Ø System reset button 
Ø LEDs for system signals (power, HDD access, LAN1, LAN2, and failure event) 
Hard Drive Trays 
Ø 12 hard drive trays (may serve NAS, RAID, or media streaming applications) 
Ø Hot-swappable for ease of use 
Drive Bays 
Ø Two external bays (one slim CD/DVD-ROM and one standard FDD) 
Ø Internal HDD bay for operating system 
Backplanes 
Ø Supports 3pcs of 4-in-1 IDE ATA133/Ultra320 SCSI/SATA backplanes 
Motherboard 
Ø Extended ATX form factor up to 12”×13” 
Ø Supports numerous brands (i.e. Intel
®
, Supermicro
®
, Tyan, Gigabyte
™
, Asus
®
, 
etc.) 
CPU 
Ø Supports Intel
®
 P4, Intel
®
 DP Xeon
™
, AMD Athlon
™
 MP, or AMD Opteron
™
Ø Excellent thermal solution for DP Xeon up to 3.06+GHz 
PSU 
Ø Supports single or redundant 3U power supply 
Ø Power output up to 800W (depends on power supply) 
Cooling Fans 
Ø Four 80mm ball-bearing fans (two 60mm rear fans optional) 
Slot Openings 
Ø 7 PCI expansion slots at the rear 










