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Green rectangular DDR4 memory module with gold edge contacts and black chips, no heat spreader

OWC

OWC 128GB DDR4 2933MHz CL21 ECC Registered RDIMM 2R9D44R4128G

SKU CH-JETB-AXSPC

128 GB DDR4 2933 MHz ECC registered RDIMM for Lenovo ThinkAgile VX series servers

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

Capacity 128GB

  • 128GB capacity supports large server workloads
  • ECC registered design protects data integrity
  • 2933MHz DDR4 speed with CL21 latency
  • 2V operation meets JEDEC standards
  • Compatible with Lenovo ThinkAgile VX series servers

128GB DDR4 ECC Registered RDIMM for Lenovo

This 128GB DDR4 2933MHz CL21 module is built for Lenovo ThinkAgile VX servers running second-generation Xeon Scalable processors. It targets administrators who need high-capacity, error-correcting memory to support virtualisation workloads or large datasets in the listed VX3320, VX3520-G, VX5520, VX7320-N and VX7520 platforms.

Compatibility and configuration checks before

Verify that the target server currently uses registered ECC DDR4 RDIMMs, because this module will not work in systems that require unbuffered memory. Confirm the motherboard has a free 288-pin DDR4 slot and that the existing memory population rules allow a 4Rx4 rank configuration. The stick operates at 1.2V and is backward compatible with 2133MHz, 2400MHz and 2666MHz bus speeds if the platform requires a lower frequency.

Integration into a server build

The registered design places a buffer on the command bus, reducing electrical load on the memory controller and allowing the platform to populate more slots per channel. ECC circuitry detects and corrects single-bit errors, protecting data integrity in always-on environments. With no heat spreader fitted, the module relies on the server’s directed airflow for cooling, leaving adjacent DIMM slots unobstructed for further capacity expansion.

How it compares

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

Price $651.99
Pricier than about 55% 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 $5.09 per GB
Cheaper than about 75% 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

Does the 128GB module come alone or in a kit, and is any extra hardware needed?

This is a single 128GB 288-pin RDIMM. No cables, brackets or additional parts are required — just an available DDR4 slot in a compatible ThinkAgile server.

Should I choose the 2933MHz CL21 4Rx4 version or a different speed for my VX5520?

The 2933MHz CL21 4Rx4 module is the specified match for Xeon SP Gen 2 ThinkAgile models including the VX5520. It also runs at 2666MHz, 2400MHz or 2133MHz if the platform requires a lower speed.

What does the 2933MHz rating deliver once installed in a VX7520?

The module operates at up to 2933MHz with CL21 latency at 1.2V, providing ECC registered error correction and 4Rx4 organisation for maximum capacity per slot in the VX7520.

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