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Green bare circuit board with gold edge connector and black memory chips

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin ECC RDIMM ThinkAgile HX

SKU CH-BB1G-AE7P4

A 128 GB DDR4 ECC registered DIMM running at 2933 MHz with CL21 latency for compatible Lenovo ThinkAgile HX servers

  • Total capacity128 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latency21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB capacity expands server memory headroom
  • ECC registered design protects data integrity in critical workloads
  • DDR4 2933 MHz speed matches ThinkAgile HX platform specifications
  • Single 8Rx4 module simplifies upgrades without mixing ranks
  • JEDEC and RoHS compliant for warranty-safe deployment

128GB DDR4 ECC RDIMM for ThinkAgile HX

This 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin ECC Registered RDIMM is built for Lenovo ThinkAgile HX servers running second-generation Xeon Scalable processors. It targets administrators expanding memory in HX1320, HX1321, HX2320, HX2321 or HX3320 nodes. The module will not work in standard desktop PCs or alongside unbuffered or load-reduced DIMMs.

Sustained load behaviour

ECC and registered buffering keep data integrity intact during continuous workloads such as virtualisation, databases or high-performance computing. Operation at 1.2V and CL21 latency delivers stable throughput at the rated 2933 MT/s, while backward compatibility allows the module to run at 2133, 2400 or 2666 MT/s if the platform requires it.

Build and mounting

The bare 288-pin RDIMM has no heat spreader, relying on server chassis airflow for cooling. JEDEC and RoHS compliance ensures a warranty-safe upgrade that meets OEM specifications. A single 128GB stick fills one slot, leaving remaining slots free for future expansion without mixing memory types.

How it compares

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

Price $699.99
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).
CAS latency 21
Lower than about 63% of the 483 comparable items (median 22).
Price per GB $5.47 per GB
Cheaper than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latency21
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

How much power does the 1.2V DDR4 2933 module draw when the server runs continuously?

The module operates at 1.2V, the standard DDR4 voltage for registered ECC DIMMs, keeping power draw low during all-day workloads.

What must the system already have to accept this 288-pin 8Rx4 registered DIMM?

A Lenovo ThinkAgile HX1320, HX1321, HX2320, HX2321 or HX3320 with Xeon SP Gen 2 processors and DDR4 registered DIMM slots.

Will this 2933 MHz CL21 stick work alongside existing 2133, 2400 or 2666 MHz modules in the same ThinkAgile server?

Yes, it is backward compatible with 2133, 2400 and 2666 MHz speeds; all modules will run at the lowest common frequency.

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