NEC Express5800 Series User Manual page 65

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, or channels 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 uses channels 0 and 1 or channels 2 and 3.
• To use Memory LockStep feature, install N8102-683/684 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-1E User's Guide
1. Installing Internal Options
LockStep set
#7
LockStep set
#3
LockStep set
#8
LockStep set
#4
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