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Two green DDR3L DIMMs with gold contacts and black chips

Computer Memory Solutions

Computer Memory Solutions 64GB (2x32GB) DDR3L 1066 ECC Registered DIMM memory upgrade

SKU CH-R08J-32SDJ

Two 32 GB DDR3L 1066 ECC registered DIMMs give 64 GB total for Dell PowerEdge T420 servers

  • Capacity32GB
  • Type240-Pin DDR3 SDRAM
  • SpeedDDR3L 1066 (PC3L 8500)
  • CAS LatencyCL7
  • Timing7-7-7
  • Voltage1.35V
  • 64 GB total capacity for Dell PowerEdge T420 servers
  • DDR3L 1066 MHz ECC registered DIMM for data integrity
  • Low 1.35 V operation reduces server power draw
  • CL7 7-7-7 timing supports responsive memory access
  • 240-pin 4Rx4 modules install in matched pairs per bank

Server-Specific DDR3L ECC Registered Memory

This 64GB kit delivers two 32GB DDR3L 1066MHz ECC registered DIMMs built for the Dell PowerEdge T420. Each module operates at 1.35V with CL7 timing and a 4Rx4 organisation. The registered design helps maintain signal integrity in multi-DIMM server configurations. Computer Memory Solutions guarantees compatibility with the listed system.

64GB Total Capacity Across Two Modules

The pair provides 64GB toward the T420 maximum of 384GB, using two of the twelve available sockets. Each 32GB stick is a 4Rx4 device; the platform requires like modules within each memory bank, so x4 and x8 parts must not be mixed in the same bank. Capacity scales by adding further matched kits in the remaining sockets. Headroom ends when all twelve sockets are populated with qualified modules.

240-Pin DIMM Form Factor for Direct Installation

The modules slot into the server's 240-pin DDR3 sockets without adapters or cable changes. Registered buffering and ECC functionality rely on the platform's memory controller, so no extra software configuration is needed. Using matched 4Rx4 modules in each bank keeps the memory subsystem stable and leaves the remaining sockets free for future expansion.

Highlights

  • 64 GB total capacity for Dell PowerEdge T420 servers
  • DDR3L 1066 MHz ECC registered DIMM for data integrity
  • Low 1.35 V operation reduces server power draw
  • CL7 7-7-7 timing supports responsive memory access
  • 240-pin 4Rx4 modules install in matched pairs per bank

Specifications

BrandComputer Memory Solutions
ModelCM4096728500ECCRQR4
Capacity32GB
Type240-Pin DDR3 SDRAM
SpeedDDR3L 1066 (PC3L 8500)
CAS LatencyCL7
Timing7-7-7
Voltage1.35V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
ChipsetMajor Brand Chipset
Heat SpreaderBased on Current Inventory (If Required Please Contact)
Compatible SystemDell Poweredge T420
Package Content1 Memory RAM Stick

Questions about this item

Will the 1.35 V DDR3L modules run alongside the original 1.5 V DDR3 DIMMs already in my PowerEdge T420?

The T420 memory controller operates all installed DIMMs at a single voltage; mixing 1.35 V and 1.5 V kits forces the higher voltage on every module, so the DDR3L sticks will run at 1.5 V.

How can I verify the 4Rx4 registered ECC modules are recognised at 1066 MHz with CL7 timing after installation?

Enter the BIOS or iDRAC and confirm each of the 12 sockets shows 32 GB, 1066 MT/s, registered ECC, and 7-7-7 latency; the POST memory test will also report the total 64 GB.

The box contains two 32 GB sticks — do I need anything else to reach the 64 GB upgrade?

No extra parts are required; the two 240-pin DIMMs are a matched pair, but the T420 has 12 sockets total, so you can add more kits later up to the 384 GB maximum.

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