Dell PowerEdge R920 Dell PowerEdge R920 System Owners Manual - Page 39

Installing The Cable Management Tray, System Memory

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Installing The Cable Management Tray 1. Position the cable management tray above the processor heat sinks. 2. Lower the cable tray and insert the cable tray hooks into the slots on one side of the chassis. 3. Press the hooks so that they snap into the slots on the other side of the chassis. 4. Open the cable tray cover, using the release tab. 5. Route the required cables through the cable tray. 6. Close the cable tray cover. 7. Install the memory riser and fan cage. See Installing the Memory Riser and Fan cage. 8. Install the cooling fans. See Installing A Cooling Fan. 9. Install the memory risers. See Installing a Memory Riser. 10. Close the system. 11. Reconnect the system to the electrical outlet and turn the system on, including any attached peripherals. System Memory Your system supports DDR3 ECC registered DIMMs (RDIMMs) and load reduced DIMMs (LRDIMMs) at DDR3 (1.5V) and DDR3L (1.35V) voltage specifications. It also supports single, dual, quad and octal rank DIMMs of upto 1600 MHz. NOTE: MT/s indicates DIMM speed in MegaTransfers per second. Memory bus operating frequency can be 1066 MT/s, 1333 MT/s, and 1600 MT/s depending on: • DIMM type (RDIMM and LRDIMM) • 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 system memory contain 96 memory sockets organized into eight memory risers, split into four sets of two risers per processor. Each memory riser has: • 12 DIMM sockets arranged 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. • Two Scalable Memory Interconnect-2 (SMI-2) ports that help DIMMs to connect with the processor. • Two Scalable Memory Buffers (SMB) that provide access to the DIMMs. SMI-2 ports operate in two modes: NOTE: GT/s indicates memory bus speed in Giga transfers per second. • Performance Mode (2:1) up to 2.66 GT/s for higher bandwidth. • Lock Step Mode (1:1) up to 1.33 GT/s for higher DDR3 speeds and better RAS (Reliability, Availability, and Serviceability) features. The maximum memory that is supported on your system varies according to the sizes of memory modules being used. Single, dual, quad, and octal-rank DIMMs of sizes 4 GB and 8 GB. The system also supports 16 GB RDIMM and 32 GB/64 GB of LRDIMMs memory for a total of up to 6 TB. 39

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Installing The Cable Management Tray
1.
Position the cable management tray above the processor heat sinks.
2.
Lower the cable tray and insert the cable tray hooks into the slots on one side of the chassis.
3.
Press the hooks so that they snap into the slots on the other side of the chassis.
4.
Open the cable tray cover, using the release tab.
5.
Route the required cables through the cable tray.
6.
Close the cable tray cover.
7.
Install the memory riser and fan cage. See
Installing the Memory Riser and Fan cage
.
8.
Install the cooling fans. See
Installing A Cooling Fan
.
9.
Install the memory risers. See
Installing a Memory Riser
.
10.
Close the system.
11.
Reconnect the system to the electrical outlet and turn the system on, including any attached peripherals.
System Memory
Your system supports DDR3 ECC registered DIMMs (RDIMMs) and load reduced DIMMs (LRDIMMs) at DDR3 (1.5V) and
DDR3L (1.35V) voltage specifications. It also supports single, dual, quad and octal rank DIMMs of upto 1600 MHz.
NOTE:
MT/s indicates DIMM speed in MegaTransfers per second.
Memory bus operating frequency can be 1066 MT/s, 1333 MT/s, and 1600 MT/s depending on:
•
DIMM type (RDIMM and LRDIMM)
•
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 system memory contain 96 memory sockets organized into eight memory risers, split into four sets of two risers per
processor. Each memory riser has:
•
12 DIMM sockets arranged 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.
•
Two Scalable Memory Interconnect-2 (SMI-2) ports that help DIMMs to connect with the processor.
•
Two Scalable Memory Buffers (SMB) that provide access to the DIMMs.
SMI-2 ports operate in two modes:
NOTE:
GT/s indicates memory bus speed in Giga transfers per second.
•
Performance Mode (2:1) up to 2.66 GT/s for higher bandwidth.
•
Lock Step Mode (1:1) up to 1.33 GT/s for higher DDR3 speeds and better RAS (Reliability, Availability, and
Serviceability) features.
The maximum memory that is supported on your system varies according to the sizes of memory modules being used.
Single, dual, quad, and octal-rank DIMMs of sizes 4 GB and 8 GB. The system also supports 16 GB RDIMM and 32 GB/64
GB of LRDIMMs memory for a total of up to 6 TB.
39