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Two green DDR4 LRDIMM sticks with gold contacts and black chips

OWC

OWC 256GB (2x128GB) DDR4 2933 ECC LRDIMM 288-pin 1.2V CL21 4Rx4 HP SimpliVity 325 Gen10

SKU CH-BWKZ-21159

256 GB kit of two 128 GB DDR4 2933 ECC load-reduced DIMMs for HP SimpliVity 325 Gen10 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank4Rx4

Capacity 256GB (2 x 128GB)

  • ECC load-reduced design protects data integrity in servers
  • 256GB kit (2 × 128GB) expands memory capacity for heavy workloads
  • DDR4 2933 CL21 at 1.2V delivers rated speed with standard voltage
  • 288-pin LRDIMM 4Rx4 matches HP SimpliVity 325 Gen10 slot requirements
  • Backward compatible with 2133, 2400 and 2666MHz systems

System-specific server memory

This OWC kit delivers 256 GB of DDR4 ECC load-reduced DIMM memory in two 128 GB modules. It is built for the HP SimpliVity 325 Gen10 and operates at 2933 MHz with CL21 latency at 1.2 V. The 4Rx4 registered design targets virtualisation hosts and dense compute nodes that require maximum capacity per slot.

288-pin LRDIMM form factor

Each module uses the 288-pin load-reduced interface that reduces electrical load on the server memory bus. No heat spreader is fitted, so airflow in the chassis must handle thermal management. The kit cannot be mixed with unbuffered or standard registered ECC DIMMs, and it will not work in desktop or consumer platforms.

Replaces HP part numbers 19047 and 11040 series

This upgrade supersedes HP part numbers P19047-H21, P19047-K21, P19047-B21, P18455-B21, P11057-1A1, P11057-0A1, P11040-K21, P11040-H21 and P11040-B21. Backward compatibility with 2133, 2400 and 2666 MHz buses allows deployment in earlier DDR4 generations. Buyers who need unbuffered memory or desktop compatibility should look elsewhere.

How it compares

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

Price $1,326.99
Pricier than about 63% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $5.18 per GB
Cheaper than about 74% 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 number2L9D44R4256P
Total capacity256 GB (2 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP SimpliVity 325 Gen10

Other versions of this model

5 more in the same range

Questions about this item

What does PC4-23400 mean for the DDR4-2933 speed of these modules?

PC4-23400 is the JEDEC designation for DDR4-2933, indicating a peak data rate of 23400 MT/s for each 288-pin LRDIMM.

What physical slot and system clearance do the 288-pin LRDIMMs require?

Each 128GB module uses a standard 288-pin DDR4 DIMM slot; the kit is validated for the HP SimpliVity 325 Gen10 chassis.

How are the two 128GB LRDIMMs installed, and what mixing rule must be followed?

Insert both modules into the correct HP SimpliVity 325 Gen10 DIMM slots; do not mix these 4Rx4 load-reduced ECC DIMMs with unbuffered or registered ECC memory.

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