NEC Express5800 Series User Manual page 69

Chapter 2 Preparations
(2)
Memory Lock Step Feature (x8 SDDC)
In Memory Lock Step feature, the DIMMs in two groups corresponding to two memory channels (channels 0 and
1, 2 and 3) is multiplexed and operated in parallel to enable x8 SDDC. With this feature, a single device can
detect and correct one to eight-bit error.
LockStep set
#5
LockStep set
#1
LockStep set
#6
LockStep set
#2

Note Memory LockStep feature (x8 SDDC) uses channels 0 and 1 or channels 2 and
3. To use Memory LockStep feature (x8 SDDC), install N8102-691/692
additional memory card (two DIMMs of same model).

The N8102-691/692 additional memory card must not be installed with another
memory card.
Memory controller
Memory controller
Express5800/T120g User's Guide
1. Installing Internal Optional Devices
LockStep set
#7
LockStep set
#3
LockStep set
#8
LockStep set
#4
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