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Green rectangular DDR4 RDIMM module with gold edge contacts and black memory chips on both sides

OWC

OWC 128GB DDR4 2933MHz ECC Registered RDIMM 2R9D44R4128G

SKU CH-4EHZ-D0X92

A 128GB DDR4 2933MHz ECC registered RDIMM for Lenovo ThinkAgile HX3520-G, HX3521-G, HX5520, HX5521 and HX7520 servers

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 128GB

  • 128GB capacity scales server workloads across Lenovo ThinkAgile HX models
  • ECC registered design protects data integrity in Xeon SP Gen 2 systems
  • DDR4 2933MHz CL21 at 1.2V balances speed with power efficiency
  • JEDEC and RoHS compliant for warranty-safe upgrades in 288-pin slots
  • Backward compatible with 2133, 2400 and 2666MHz platforms

128GB DDR4 2933MHz ECC RDIMM for Lenovo ThinkAgile

This 128GB DDR4 2933MHz ECC Registered RDIMM is built for Lenovo ThinkAgile servers based on Xeon SP Gen 2 platforms. It targets administrators expanding memory in HX3520-G, HX3521-G, HX5520, HX5521 and HX7520 systems. The module follows JEDEC PC4-23400 specifications at 1.2V.

Installation notes and common issues

The 288-pin DIMM seats in standard DDR4 server slots. Because it is ECC Registered 4Rx4 memory, it will not work in desktop boards or alongside unbuffered modules. Mixing registered and unbuffered DIMMs prevents boot. Backward compatibility with 2133MHz, 2400MHz and 2666MHz buses is supported.

Suitable for ThinkAgile upgrades; not for desktops

This kit suits IT teams extending the life of qualified ThinkAgile servers or building new nodes on the supported platform list. Buyers needing memory for standard desktop PCs, consumer workstations or non-listed server models should look elsewhere.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $691.99
Pricier than about 56% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.41 per GB
Cheaper than about 71% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D44R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

How can I verify the 128GB DDR4 2933MHz ECC Registered RDIMM is running at PC4-23400 CL21 after installation?

Enter the system BIOS or UEFI and confirm the memory speed reads 2933MHz with CAS latency 21, then run a memory diagnostic such as MemTest to check for errors.

What comes with the 2R9D44R4128G module and what must I source separately?

The box contains the 128GB 288-pin DDR4 ECC Registered RDIMM only; no heat spreader, cables, brackets or tools are included.

Which capacity and speed version should I choose for a Lenovo ThinkAgile HX5520 running Xeon SP Gen 2?

This 128GB 2933MHz CL21 1.2V 4Rx4 module matches the HX5520 specification and is also backward compatible with 2133MHz, 2400MHz and 2666MHz operation.

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