Dell PowerEdge M420 Dell PowerEdge M620 Systems Owner's Manual - Page 30

Installing The Cooling Shroud, System Memory

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Installing The Cooling Shroud CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product. 1. Position the tabs below the shroud to align with the holes on the heat sink installed on processor socket CPU1. 2. Lower the cooling shroud into the system until the tabs on the sides of the shroud engage with the slots on the blade chassis and the pins under the shroud engage with the holes on the heat sink. 3. Close the blade. 4. Install the blade in the enclosure. System Memory Your system supports DDR3 unbuffered ECC DIMMs (UDIMM ECC) and registered DIMMs (RDIMMs). It supports DDR3 and DDR3L voltage specifications. NOTE: MT/s indicates DIMM speed in MegaTransfers per second. Memory bus operating frequency can be 1600 MT/s, 1333 MT/s, 1066 MT/s, or 800 MT/s depending on: • DIMM type (UDIMM or RDIMM) • DIMM configuration (number of ranks) • maximum frequency of the DIMMs • number of DIMMs populated per channel • DIMM operating voltage • system profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized) • maximum supported DIMM frequency of the processors The following table shows the memory populations and operating frequencies for the supported configurations. DIMM Type DIMMs Populated/ Channel UDIMM ECC 1 2 RDIMM 1 2 3 Operating Frequency (in MT/s) 1.5 V 1333, 1066, and 800 1333, 1066, and 800 1600, 1333, and 1066 1600, 1333, and 1066 1066 and 800 1.35 V 1066 and 800 1066 and 800 1333 and 1066 1333 and 1066 Not Applicable Maximum DIMM Rank/ Channel Dual rank Dual rank Dual rank Dual rank Dual rank The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket black, and the third socket green. NOTE: DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to processor 2. 30

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Installing The Cooling Shroud
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.
1.
Position the tabs below the shroud to align with the holes on the heat sink installed on processor socket CPU1.
2.
Lower the cooling shroud into the system until the tabs on the sides of the shroud engage with the slots on the
blade chassis and the pins under the shroud engage with the holes on the heat sink.
3.
Close the blade.
4.
Install the blade in the enclosure.
System Memory
Your system supports DDR3 unbuffered ECC DIMMs (UDIMM ECC) and registered DIMMs (RDIMMs). It supports DDR3
and DDR3L voltage specifications.
NOTE:
MT/s indicates DIMM speed in MegaTransfers per second.
Memory bus operating frequency can be 1600 MT/s, 1333 MT/s, 1066 MT/s, or 800 MT/s depending on:
•
DIMM type (UDIMM or RDIMM)
•
DIMM configuration (number of ranks)
•
maximum frequency of the DIMMs
•
number of DIMMs populated per channel
•
DIMM operating voltage
•
system profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)
•
maximum supported DIMM frequency of the processors
The following table shows the memory populations and operating frequencies for the supported configurations.
DIMM Type
DIMMs Populated/
Channel
Operating Frequency (in MT/s)
Maximum DIMM Rank/
Channel
1.5 V
1.35 V
UDIMM ECC
1
1333, 1066, and 800
1066 and 800
Dual rank
2
1333, 1066, and 800
1066 and 800
Dual rank
RDIMM
1
1600, 1333, and 1066
1333 and 1066
Dual rank
2
1600, 1333, and 1066
1333 and 1066
Dual rank
3
1066 and 800
Not Applicable
Dual rank
The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12-socket set is
organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket
black, and the third socket green.
NOTE:
DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to
processor 2.
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