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Linux Models

Supporting Red Hat Enterprise Linux Advanced Platform 5.5 (EM64T), the R320a-E4 and R320b-M4 deliver superior fault tolerance and high availability with the diverse/a variety of OSS and application software.

Linux Models

NEC Express5800/R320a-E4NEC Express5800/R320b-M4
Form Factor 
4U rack-mountable 
 Processor     Type
 Intel® Xeon® processor E5504 Intel® Xeon® processor X5670
Clock Speed 2GHz  2.93GHz
L3 Cache
Core / Thread
4C / 4T
 6C / 12T
Logical Processors
1 (std.) - 2 (max.)
Chipset Intel® 5500 with GeminiEngine™
 Memory   Type DDR3 SDRAM DIMM with ECC, Registered
Logical Max.
96GB (8GB x 3 x 4)
Memory Clock
800MHz 1333MHz
Logical Max.
4.8TB (600GB x 8)
SAS 3Gb/s, RAID 1
Optional *1
ODD (Logical)
DVD-RAM drive *2
Device Bay
PCI Slots (Logical) Low profile: PCI Express (x8) x 2 *3
Low profile: PCI Express (x8) x 2 *3
Full height: PCI Express (x8) x 2 *3
Video RAM 32MB
Network (Logical)
1000BASE-T x 2, Management LAN x 1
External Interface
15-pin mini-D sub x 1
USB *4
USB2.0 x 4 
Dimensions (WDH) 
483 x 736 x 178 mm
Weight (max.) 
Max. Power Consumption 
1400VA / 1390W
Temperature and humidity condition 
10 to 35°C / 20 to 80% (non-condensing)
Heat Dissipation 
Supported OS 
Red Hat® EnterpriseLinux® 5.5 (EM64T)

*1 Required for maintenance.

*2 DVD: max. X8, CD: max. X24
Writing software is not provided for this combo drive.

*3 Operates at x4 bandwidth

*4 Support only NEC-authorized keyboard, mouse, floppy disk drive, and KVM switch

Note: Specifications are subject to change without notice.