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Green rectangular circuit board with gold edge contacts and black memory chips

OWC

OWC 64GB DDR4 2933MHz ECC RDIMM 2Rx4 CL21 1.2V Lenovo ThinkAgile HX3520-G HX3521-G HX5520 HX5521 HX7520

SKU CH-MQM6-K72RR

64GB DDR4 2933MHz ECC registered RDIMM for Lenovo ThinkAgile Xeon SP Gen 2 servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

  • 64GB capacity lets Lenovo ThinkAgile servers handle larger workloads
  • ECC registered design protects data integrity in mission-critical systems
  • DDR4 2933MHz speed with CL21 latency delivers responsive server performance
  • 2V operation reduces power draw in dense memory configurations
  • Compatible with HX3520-G, HX3521-G, HX5520, HX5521 and HX7520 models

Purpose-built server memory

This OWC 64GB DDR4 2933MHz ECC RDIMM is engineered for Lenovo ThinkAgile HX series servers running Xeon SP Gen 2 processors. The registered design with error-correcting code targets administrators who need data integrity in virtualisation clusters or hyper-converged infrastructure.

Registered DIMM implications

The 288-pin module operates at 1.2V with CL21 latency and a 2Rx4 rank organisation. Registered buffering and ECC mean it cannot be mixed with unbuffered memory and will not function in standard desktop boards. Backward compatibility with 2133MHz, 2400MHz and 2666MHz bus speeds eases mixed-population deployments.

Replaces Lenovo service parts

This module directly substitutes Lenovo part numbers 4X70V98063, 4ZC7A08710 and 4ZC7A08744. The upgrade is worthwhile when expanding capacity on HX3520-G, HX3521-G, HX5520, HX5521 or HX7520 nodes, or when refreshing older DDR4 2133MHz kits for higher bandwidth. Builders needing consumer DIMMs or non-ECC memory should look elsewhere.

How it compares

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

Price $364.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $5.70 per GB
Cheaper than about 68% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number2R9D42R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What DDR4 standard does the PC4-23400 rating correspond to and what speed does it cap at?

PC4-23400 is the JEDEC designation for DDR4-2933; the module runs at 2933 MHz with CL21 latency.

What physical slot and form factor does this 288-pin RDIMM require?

It fits a standard 288-pin DDR4 DIMM socket; the module has no heat spreader, so it clears normal server heatsinks.

How is the module installed and what common mistake should be avoided?

Align the notch with the slot key, press firmly until both latches click, and do not mix these registered ECC DIMMs with unbuffered memory.

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