Memory Clock - NEC express5800 A2010b User Manual

Chapter 2 Preparations

1.14.2 Memory Clock

The server supports the memory clock speed of DDR3-1066/1333/1600MHz. However, the actual memory
clock speed depends on memory configuration and supported memory RAS feature. (The all of DIMMs operate
at the same clock speed.)
(1) DIMM type: RDIMM
N code of 1Rank DIMM: NE3302- H010F/H020F/H030F
N code of 2Rank DIMM: NE3302- H011F/H021F/H031F
Far End Slot
(DIMM 1/2/3/4)
Number of DIMMs = 1
1Rank DIMM
2Rank DIMM
Number of DIMMs = 2
1Rank DIMM
2Rank DIMM
2Rank DIMM
(2) DIMM type: LRDIMM
N code of 4Rank DIMM: NE3302- H012F/H022F/H032F
N code of 8Rank DIMM: NE3302- H013F/H023F/H033F
Far End Slot
(DIMM 1/2/3/4)
Number of DIMMs = 1
4Rank DIMM
8Rank DIMM
Number of DIMMs = 2
4Rank DIMM
8Rank DIMM
Note See Chapter 2 (1.14.3 Memory RAS Feature) and (1.14.6 Using Memory RAS Feature) for
details of Memory RAS feature.
Note About the clock speed and voltage of the memory, basically, this system gives priority to
power saving and operates. Therefore, when [Auto] is selected in [Memory Voltage] on the
BIOS SETUP screen, In the case of the memory configuration which contains a 8Rank
DIMM, the system operates at 1.5V, when the memory are consisted of 1Rank / 2Rank /
4Rank DIMMs operates at 1.35V. In operating the clock speed of the memory at 1600
MHz, on the BIOS SETUP screen, select [Lock Step] in [Memory RAS Mode], and select
[1.5V] in [Memory Voltage], after having DIMM composition which can use the LockStep
function. Use BIOS SETUP menu to check and change of the BIOS settings. Refer to
Chapter 2 (1.2.2 (2) Memory Configuration Submenu) in Maintenance Guide for details.
Near End Slot
(DIMM 5/6/7/8)
absent or disable
absent or disable
1Rank DIMM
2Rank DIMM
2Rank DIMM
Near End Slot
(DIMM 5/6/7/8)
absent or disable
absent or disable
4Rank DIMM
8Rank DIMM
Express5800/A1040b, A2040b, A2020b, A2010b User's Guide
1. Installing / Removing Internal Options
Supported clock speed
(MHz)
(Normal Voltage 1.5 V)
Independent LockStep
1066, 1333 1333, 1600
1066, 1333 1333, 1600
1066, 1333 1333, 1600
1066, 1333 1333, 1600
1066, 1333 1333, 1600
Supported clock speed
(MHz)
(Normal Voltage 1.5 V)
Independent LockStep
1066, 1333 1333, 1600
1066 1066
1066, 1333 1333, 1600
1066 1066
Supported clock speed (MHz)
(Low Voltage 1.35 V)
Independent LockStep
1066, 1333 1333
1066, 1333 1333
1066, 1333 1333
1066, 1333 1333
1066, 1333 1333
Supported clock speed (MHz)
(Low Voltage 1.35 V)
Independent LockStep
1066, 1333 1333
– –
1066, 1333 1333
– –
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