NEC Express5800/R120g-2M User Manual page 65

Chapter 2 Preparations
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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, or channels 2 and 3) is multiplexed and operated in parallel to enable x8 SDDC (x8 Single Device Data
Correction). With this feature, one DIMM can detect and correct one to eight-bit error.
LockStep Set
#9
LockStep Set
#5
LockStep Set
#1
LockStep Set
#10
LockStep Set
#6
LockStep Set
#2
Note  Memory LockStep feature uses channels 0 and 1 or channels 2 and 3.
 To use Memory LockStep feature, install N8102-669/670 additional memory
board (two DIMMs of same model).
 DIMMs used in LockStep set must be of the same model number.
Memory controller
Memory controller
Express5800/R120g-2M User's Guide
1. Installing Internal Optional Devices
LockStep Set
#11
LockStep Set
#7
LockStep Set
#3
LockStep Set
#12
LockStep Set
#8
LockStep Set
#4
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