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Two green 288-pin DDR4 ECC LRDIMM modules in antistatic packaging

OWC

OWC 256GB (2x128GB) DDR4 2933 PC4-23400 CL21 4Rx4 288-pin 1.2V ECC Load Reduced DIMM memory upgrade

SKU CH-Z0H4-83BPS

ECC load-reduced DDR4 kit adds 256 GB across two 128 GB modules at 2933 MHz for HP ProLiant 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)

  • 256 GB total capacity from two 128 GB modules for high-density server workloads
  • ECC load-reduced design maintains data integrity under heavy multi-threaded demands
  • DDR4 2933 speed with CL21 latency delivers responsive throughput for Gen10 platforms
  • 2 V operation reduces power draw across large memory configurations
  • Validated for HP ProLiant DL560, DL580, DX360, DX380 and DX560 Gen10 systems

ECC Load-Reduced DDR4 for HP ProLiant Gen10

This 256 GB kit delivers two 128 GB DDR4 2933 LRDIMMs built for HP ProLiant DL560, DL580, DX360, DX380 and DX560 Gen10 servers. Each module runs at 1.2 V with CL21 latency and 4Rx4 organisation. The load-reduced design reduces electrical load on the memory bus, allowing higher density per channel in enterprise workloads.

Suited for memory-bound server roles.

The modules target virtualisation hosts, large databases and analytics clusters that need maximum capacity per slot. They will not work in standard desktop PCs, consumer workstations or any system that requires unbuffered or registered ECC DIMMs. Mixing with those types is unsupported and will prevent boot.

256 GB total with backward speed headroom

The kit provides 256 GB across two slots, leaving additional DIMM slots free for further expansion on supported platforms. Rated at 2933 MT/s, the memory also runs at 2666, 2400 and 2133 MT/s when paired with slower processors or bus limits. Capacity scales until the platform's maximum supported memory per socket is reached.

How it compares

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

Price $1,311.99
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 $5.12 per GB
Cheaper than about 75% 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 ProLiant DL560 Gen10
HP ProLiant DL580 Gen10
HP ProLiant DX360 Gen10
HP ProLiant DX380 Gen10
HP ProLiant DX560 Gen10

Other versions of this model

5 more in the same range

Questions about this item

Which server models must I already own for this OWC 256GB DDR4 2933 ECC Load Reduced kit to work?

This kit is validated for HP ProLiant DL560 Gen10, DL580 Gen10, DX360 Gen10, DX380 Gen10 and DX560 Gen10 servers.

Can I keep my existing 2133MHz, 2400MHz or 2666MHz DDR4 ECC Load Reduced modules and add these 2933MHz sticks?

Yes, the modules are backward compatible with 2133MHz, 2400MHz and 2666MHz speeds, but all slots must use ECC Load Reduced DIMMs; mixing with unbuffered or registered ECC is not supported.

How can I verify the 2x128GB kit is running at the correct 2933MHz CL21 1.2V settings after installation?

Check the server BIOS or iLO interface — it should report each DIMM as 128GB, 4Rx4, DDR4-2933, CL21, 1.2V ECC Load Reduced.

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