Help Me Choose: Memory (M420)

 
DIMM Speed

There are two speed options:

  • 1333 MT/s — DIMMs may run at 1.35 volt or 1.5 volt
  • 1600 MT/s — DIMMs may run at 1.35 volt or 1.5 volt

The table below lists the comparison between different DIMM types. For more information on memory, please refer to our memory page at www.dell.com/poweredge/memory (In English)

DIMM Comparison

 UDIMM RDIMM
Registered/Buffered NoAddress only
Frequency/Speed1600 MT/s1333, 1600 MT/s
Ranks Supported1 or 21, 2 or 4
Capacity per DIMM2 and 4GB2, 4, 8, 16 and 32GB
Maximum DIMM per Channel23 (except for 32GB)
Dynamic RAM (DRAM) Technologyx8x4 and x8
Temperature Sensor Yes Yes
Error-Correction Code (ECC) Yes Yes
Single Device Data Correction (SDDC) Yes
(requires Advanced ECC mode)
 Yes
(x8 requires Advanced ECC mode)
Advanced ECC Yes Yes
Address Parity No Yes
DIMM
Type
DIMM
Ranking
DIMM Rated
Voltage,
Speed
 12th-Generation Memory (EN, 1DPC Platform — M420)
 1 DPC 2 DPC
 1.35V 1.5V 1.35V 1.5V
 RDIMM SR/DR DDR3 (1.5V),
1600
 16001600   
 RDIMM SR/DR DDR3L (1.35V/1.5V),
1333
 13331333  
 UDIMM SR/DR DDR3L (1.35V/1.5V),
1600
 16001600   
 RDIMM QRDDR3L (1.35V/1.5V),
1333
 13331333   
 LRDIMM QR DDR3L (1.35V/1.5V),
1333
    

  • 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