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Four green DDR5 ECC registered RDIMM sticks in a row

OWC

OWC 4R8D52R8128S 128GB (4x32GB) DDR5 4800 CL40 ECC Registered RDIMM

SKU CH-QXP8-GTM2P

A 128 GB DDR5 ECC registered RDIMM kit of four 32 GB modules running at 4800 MT/s CL40 for compatible HP ProLiant Gen11 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

  • 128GB total capacity across four 32GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1V operation reduces power draw in dense configurations
  • Validated for HP ProLiant Gen11 DL325 DL345 DL360 DL365 DL380

Server-grade DDR5 upgrade kit

This 128 GB kit contains four 32 GB DDR5 4800 CL40 registered ECC RDIMMs built to JEDEC standard at 1.1 V. It is designed for HP ProLiant Gen11 servers including the DL325, DL345, DL360, DL365 and DL380 where registered memory is required.

Verify registered ECC requirement

Your system must accept 288-pin DDR5 registered ECC modules and cannot mix them with unbuffered or load-reduced DIMMs. Confirm the server has four available slots and that the BIOS is current before installation.

Low-voltage DDR5 thermals

Operating at 1.1 V, the modules run cool without heat spreaders in normal server airflow. Registered buffering adds minimal latency while maintaining signal integrity under sustained multi-threaded workloads.

How it compares

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

Price $3,324.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.98 per GB
Pricier than about 71% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHP ProLiant DL325 Gen11
HP ProLiant DL345 Gen11
HP ProLiant DL360 Gen11
HP ProLiant DL365 Gen11
HP ProLiant DL380 Gen11

Other versions of this model

5 more in the same range

Questions about this item

What comes in the 128GB kit and is anything else needed for installation?

The kit contains four 32GB DDR5 4800 CL40 2Rx8 288-pin 1.1V ECC Registered RDIMM modules. No additional parts are required for installation into compatible HP ProLiant Gen11 servers.

How do I choose between this 128GB kit and other capacities for my DL380 Gen11?

This kit provides 128GB total using four 32GB RDIMMs. Select it when your workload needs that capacity and your server has four available DDR5 slots. Other OWC kits offer different total capacities and module counts.

What does the DDR5 4800 CL40 rating mean once the modules are running in a DL360 Gen11?

The modules operate at 4800 MT/s with a CAS latency of 40 cycles at 1.1V, delivering PC5-38400 bandwidth. The registered ECC design adds error correction and signal buffering for stable server operation.

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