|

PowerEdge memory

PowerEdge — It's all committed to memory
Realize the full value of your PowerEdge servers with improved Dell memory solutions that are designed to help accelerate data management and expand virtual environments. On this page, you can learn what is available and how it can work for you to help build an improved and more useful data center.
 

Memory types

Learn more about your memory choices to better match our solutions to your needs. For our 12th-generation servers, we offer double-data rate type 3 (DDR3) digital RAM solutions that support larger capacities, higher frequencies, greater bandwidth, lower latency and lower operating voltages than previous-generation DDR2 memory. Your DDR3 options include:

 

Standard Voltage (SV) DDR3 operates at 1.5 volts, which is currently required for 1866 million transfers per second (MT/s).

 

Low Voltage (LV) DDR3 operates at 1.35 volts or 1.5 volts. At 1.35 volts the memory can consume less power and reduce heat, but can still be boosted to 1.5V when the memory channel requires additional voltage to help maintain maximum speed.

With the introduction of our 13th-generation servers, DDR4 memory has been released. DDR4 operates at 1.2 volts. The voltage decrease from DDR3 allows for lower active and standby power usage.
 

DIMMs

Choose from three different dual in-line memory modules (DIMM) architectures — UDIMM, RDIMM and LRDIMM.
With the introduction of our 13th-generation servers, DDR4 memory has been released. DDR4 operates at 1.2 volts. The voltage decrease from DDR3 allows for lower active and standby power usage.

UDIMM is an unbuffered, low-density, low-latency DIMM that doesn’t include a register or a buffer chip. UDIMMs are generally used in applications requiring the lowest possible latency.

 

RDIMM is a registered DIMM that provides high signal integrity — performing parity checking to detect improper addresses or commands — and increased performance for heavy workloads. RDIMMs experience slightly increased latency and power consumption over UDIMMs due to the onboard register.


LRDIMM
uses a buffer to reduce memory loading to a single load on all DDR signals, allowing for greater density. 
At this time, there is not a DDR4 UDIMM option.
 PowerEdge - memory types 

Reliability, availability, serviceability

Help reduce data loss and keep your system online and operational without significant impact to performance with improved reliability, availability and serviceability (RAS) features for Dell servers and storage, including:

PowerEdge memory - Reliability, availability, serviceability    PowerEdge memory - Reliability, availability, serviceability    PowerEdge memory - Reliability, availability, serviceability 
High-reliability profile, which helps increase memory reliability through a selectable profile that adjusts parameters to reduce faults associated with speed, temperature, voltage and refresh rates. High‑reliability profile has a minor impact on power consumption and performance.     Memory mirroring involves two adjacent memory channels configured to write the same data to each channel. If one memory channel fails or encounters an error the other channel continues to transmit data. It is an excellent safeguard for systems requiring uninterrupted operation, though it cuts memory capacity in half, doubles the cost per GB and can increase power consumption.    Memory sparing can reduce downtime from correctable errors by allocating one rank (64-bit wide data area on a DIMM) per channel as a spare. If a correctable error occurs in a rank or channel, it is moved to the spare rank while the OS is running. This prevents the error from causing a failure. Memory sparing reduces memory capacity by one rank per channel and increases the cost per GB.

PowerEdge memory - More memory features

More memory features
Rely on a number of other robust features that are designed into our memory solutions to help make sure your system is optimized for performance and protected from failure. 

Fault resilient memory
Dell Fault Resilient Memory (FRM) is a Dell-patented technology that enables PowerEdge 12th and 13th-generation server customers supporting VMware vSphere 5.5 or higher to maximize available server memory while increasing protection against memory faults for the hypervisor and mission critical applications.

 
Correctable error threshold enables each DIMM to record the frequency and locations of correctable errors. If, because of a dramatic increase in errors, a failure is imminent, the memory subsystem can escalate the error logs to the system management subsystem for resolution.

 

Memory page retire is an effective fault-management feature that is coordinated through a running hypervisor. Memory faults are closely monitored and should a certain region (memory page) break a defined threshold of recoverable errors, then the faulty page will be "retired" and effectively removed from the system so that it is no longer accessed. The event is then logged so that memory can be replaced during scheduled service time.

 

DIMM SPD error logging involves a small amount of non-volatile flash memory on each DIMM that records critical information relative to any memory errors. This can help significantly reduce the time devoted to failure analysis.

 

High-density profile enables you to configure your system to run with more conservative operating parameters, which can improve overall robustness and availability.
With Dell’s latest generation of servers, we allow greater flexibility with no set configuration that limits your memory choices. To assist you, the Dell Processor and Memory Selector tool will advise configuration options to help you achieve the needs of your environment. By providing some basic inputs, such as system selection, processor choice and total capacity needed, the tool will provide you several configurations that meet your requirements.

These configurations will be based on performance, population and efficiency. You can easily change your inputs to gather more options and see how capacity changes. Reliability, availability, and serviceability (RAS) features and the number of processors can change the recommendations. The tool will also generate a PDF version of any of the recommendations that can be saved as well as emailed to you or your sales agent.

Since the tool assigns a unique identifier to each configuration, you can come back to any configuration saved in the tool at any time. The tool can be accessed here.

Should you have any questions or issues with the Dell Processor and Memory Selector tool, please contact your Dell sales agent.
Memory Speeds and Population

The 12th generation of PowerEdge™ servers offers a high level of performance in their memory subsystems with offerings that include up to 1866MT/s speed. Critical design and testing elements ensure that Dell server memory achieve the desired speeds.

The loading within a channel significantly affects memory speed. The following tables illustrate the maximum achievable speed based on memory loads:
  • Green boxes are defaults for performance/per watt
  • White boxes (with lower voltage) can be chosen to save power but run slower 
  • White boxes (with higher voltage) can be chosen through custom configuration in the bios

DIMM Type DIMM Ranking DIMM Rated Voltage, Speed12th Generation Memory (EP, 3DPC Platforms)
*DPC means DIMMs per channel.
1 DPC 2 DPC 3 DPC
1.35V 1.5V 1.35V 1.5V 1.35V 1.5V
RDIMM1R/DR

DDR3 (1.5V),

1866
186618661333
RDIMM1R/DR

DDR3L (1.35V/1.5V),

1600
160016001600160010661333
UDIMM1R/DR

DDR3L (1.35V/1.5V),

1600
1600160016001600
RDIMM4R

DDR3L (1.35V/1.5V),

1333
1066133310661066
LRDIMM4R

DDR3L (1.5V),

1866
186616001333*
LRDIMM4R

DDR3L (1.35V/1.5V),

1600
160016001600160010661333*
LRDIMM8RDDR3 (1.5V),
1600
16001600***1600***

*For PowerEdge T620, the speed clocks down to 1066MT/s
**For PowerEdge M620, the speed clocks down to 1066MT/s
***For PowerEdge M820, the speed clocks down to 1333MT/s

DIMM Type 

DIMM Ranking 

DIMM Rated Voltage, Speed 

 12th Generation Memory  (EN, 2DPC Platforms)

 1 DPC

2 DPC

 1.35V

 1.5V

 1.35V

 1.5V

 RDIMM

 SR/DR

 

DDR3L (1.5V),

1600

1600 

 1600

  1600

 1600

 RDIMM

 SR/DR

 

DDR3L (1.35V/1.5V),

1333

 1333

 1333

 1333

 1333

 UDIMM

 SR/DR

 

DDR3L (1.35V/1.5V),

1600

 1600

 1600

 1600

 1600

 RDIMM

 QR

 

DDR3L (1.35V/1.5V),

1333

1066

 1333

 1066

1066

 LRDIMM

 QR

 

DDR3L (1.35V/1.5V),

1333

 

 

 

 


The M420 is a 1DPC platform and has a unique table for speed:

 DIMM TypeDIMM Ranking DIMM Rated Voltage, Speed 12th Generation Memory (EN, 1DPC Platform — M420) 
 1 DPC2 DPC
 1.35V1.5V 1.35V  1.5V
 RDIMM SR/DR 

DDR3 (1.5V),

1600
  1600 1600  
 RDIMM SR/DR 

DDR3L (1.35V/1.5V),

1333
 1333 1333  
 UDIMM SR/DR 

DDR3L (1.35V/1.5V),

1600
 16001600   
 RDIMM QR 

DDR3L (1.35V/1.5V),

1333
 1333 1333  
 LRDIMM QR 

DDR3L (1.35V/1.5V),

1333
    
 
LRDIMM
      


 
 
 DIMM Type

 
 
 DIMM Ranking

 
 
 DIMM Rated Voltage, Speed

   12th Generation Memory (PEC EP, 2DPC Platforms)   
      *DPC means DIMMs per channel.

       1 DPC2 DPC

1.35V

1.5V

 1.35V

1.5V

RDIMM

1R/2R

DDR3 (1.5V),

1866

 

1866

 

1600

RDIMM

1R/2R

DDR3L (1.35V/1.5V),

1600

1333

1600

1333

1600

UDIMM

1R/2R

DDR3L (1.35V/1.5V),

1600

1333

1600

1333

1600

RDIMM

4R

 DDR3L (1.35V/1.5V),

1333

800

1066

800

800



DIMM Type

DIMM Ranking

DIMM Rated Voltage, Speed

12th Generation Memory (EX, 3DPC platforms)

Performance Mode

1 DPC

2 DPC

3 DPC

1.35V

1.5V

1.35V

1.5V

1.35V

1.5V

RDIMM

1R / 2R

DDR3L (1.35V/1.5V),
1600

1333

1333

1333

1333

N/A

1066

LRDIMM

4R

DDR3L (1.35V/1.5V),
1600

1333

1333

1333

1333

N/A

1333

LRDIMM

8R

DDR3 (1.5V),
1600

N/A

1066

N/A

1066

N/A

1066



DIMM Type

DIMM Ranking

DIMM Rated Voltage, Speed

12th Generation Memory (EX, 3DPC platforms)

 Advanced ECC (Lockstep)

1 DPC     

2 DPC

3 DPC

1.35V

1.5V

1.5V

1.5V

.35V

1.5V

RDIMM

1R / 2R

DDR3L (1.35V/1.5V),
1600

1333

1333

1066

1333

N/A

1066

LRDIMM

4R

DDR3L (1.35V/1.5V),
1600

1333

1600

1333

1600

N/A

1333

LRDIMM

8R

DDR3 (1.5V),
1600

N/A

1066

N/A

1066

N/A

1066


The Dell 12th generation PowerEdge servers require memory to be populated in a specific order to help ensure correct utilization and optimization of the server. Here are some basic population rules for the Socket R systems:

  • Dual in-line memory module (DIMMs) should be populated by largest capacity first.
  • In advanced ECC mode, DIMMs must be populated in matched pairs (same capacity and ranking). Odd numbers of DIMMs are not supported in this mode.
  • Optimized mode can support even or odd numbers of DIMMs.
  • For mirroring configurations, each channel must be matched (same capacity and ranking).
  • Rank sparring requires at least two DIMMs or one quad-ranked DIMM.

  
 


Memory Speeds and Population

The 13th generation of Dell PowerEdge servers delivers high-level performance in memory subsystems with offerings that include up to 2400MT/s speed. Critical design and testing elements ensure that Dell server memory achieves desired speeds.

The loading within a channel significantly affects memory speed. The following table illustrates maximum achievable speeds based on memory loads:

 


DIMM type


DIMM ranking


Capacity


DIMM rated voltage, speed

13th Generation memeory (EP, 2/3 DPC platforms)
*DPC means DIMMs per channel.

 1DPC

 2DPC

 3DPC

RDIMM

SR/DR

 4, 8, 16,
and 32GB

DDR4 (1.2V),

2133

2133

 2133

 1866

LRDIMM

QR

32GB,64GB 

DDR3L (1.2V),

2133

2133

 2133

 1866

RDIMM1R/2R4GB, 8GB, 16GB, and 32GB DDR4 (1.2V),
2400
240024001866
LRDIMM 4R64GB DDR3L (1.2V),
2400 
2400 2400  2133

 

The 13th generation of PowerEdge servers requires memory to be populated in a specific order to help ensure correct server utilization and optimization. Some basic population rules for Socket R systems, include:

  • Dual in-line memory module (DIMMs) should be populated by largest capacity first.
  • In advanced ECC mode, DIMMs must be populated in matched pairs (same capacity and ranking). Odd numbers of DIMMs are not supported in this mode.
  • Optimized mode can support even or odd numbers of DIMMs.
  • For mirroring configurations, each channel must be matched (same capacity and ranking).
  • Rank sparring requires at least two DIMMs or one quad-ranked DIMM.
 
DIMM 
Type 
 DIMM
Ranking
Capacity DIMM Rated Voltage,
       Speed 
13th Generation Memory (EX, 3DPC Platforms)
*DPC means DIMMs per channel.
 
  Performance Mode (2:1) Lockstep Mode (1:1)
  1 DPC 2 DPC 3 DPC 1 DPC 2 DPC 3 DPC
RDIMM 2R 8GB, 16GB, 32GBDDR4 (1.2V),
      2133
 1600 1600 1333 1866 1866 1333
RDIMM 4R 32GBDDR3L (1.2V),
2133
 1600 1600 1600 1866 1866 1600
RDIMM 2R8GB DDR4 (1.2V),
2400
 1600 16001600 1866 1866  1600
RDIMM 2R16GB, 32GB DDR4 (1.2V),
2400
 1600 1600 13331866 1866 1333 
LRDIMM4R64GB DDR3L (1.2V),
2400
 16001600  16001866 1866  1600