NEC Express5800 Series User Manual page 76

Chapter 2 Preparations
Logical memory capacity per channel can be calculated by following.
(Logical memory capacity per channel) = (Installed memory capacity)ｘ
Example: Memory sparing for a 16-GB (DR) product
Spare set
Spare set
Spare set
Memory capacity for spare set #4 = 16 [GB] x 2 [units] x (2 [rank] x 2 [units] - 1) / (2 [rank] x 2 [units]) = 24 [GB]
Memory capacity for spare set #5 = 16 [GB] x 1 [unit] x (2 [rank] x 1 [unit] - 1) / (2 [rank] x 1 [unit]) = 8 [GB]
Memory capacity for spare set #6 = 16 [GB] x 1 [unit] x (2 [rank] x 1 [unit] - 1) / (2 [rank] x 1 [unit]) = 8 [GB]
Logical memory capacity of memory controller #2 of CPU1: 40 [GB]
Logical memory capacity in the 2CPU configuration: 160 [GB]
76
Spare set
Spare set #4
Spare set
Spare set #5
Spare set
Spare set #6
Rank 1
CPU1 DIMM 4
Rank 2
Rank 1
CPU1 DIMM 3
Rank 2
Rank 1
CPU1 DIMM 2
Rank 2
Rank 1
CPU1 DIMM 1
Rank 2
Express5800/R120h-1E User's Guide
1. Installing Internal Optional Devices
Rank number of installed memory －1
Rank number of installed memory
Spare set #1
Spare set #2
Spare set #3
Spare set #4
Spare
Spare set #5
Spare
Spare set #6
Spare