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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR4 2666 CL19 1.2V 288pin ECC Registered RDIMM Lenovo ThinkSystem SD530 SD650 SN550 SN850 SR530

SKU CH-2CRX-5W0PQ

16 GB DDR4 2666 ECC registered RDIMM for Lenovo ThinkSystem SD530, SD650, SN550, SN850 and SR530 servers

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • 16 GB DDR4 2666 MHz CL19 ECC registered memory for reliable server workloads
  • 2 V low-voltage operation reduces power draw in dense Lenovo ThinkSystem racks
  • 288-pin RDIMM form factor fits SD530, SD650, SN550, SN850 and SR530 platforms
  • 2Rx8 dual-rank organisation maximises capacity per DIMM slot
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible deployment

Compatible Lenovo ThinkSystem models

This OWC 16GB DDR4 2666MHz CL19 1.2V 288-pin ECC Registered RDIMM is validated for Lenovo ThinkSystem servers SD530, SD650, SN550, SN850 and SR530 running Xeon SP Gen 1 processors. It replaces Lenovo part numbers 01AG618, 4X70P98202 and 7X77A01303. The module is built for server and workstation workloads that require error-correcting registered memory.

Verify registered ECC support and slot availability

Confirm the target system accepts 288-pin DDR4 ECC Registered DIMMs and that the memory controller supports registered modules; this memory will not work in platforms that only take unbuffered non-ECC DIMMs. The module is dual-rank 2Rx8 and operates at 1.2V, so ensure the server can populate the slot with a registered dual-rank stick. Do not mix this module with unbuffered memory in the same channel.

Upgrade from slower DDR4 or expand capacity

The stick is backward compatible with 2133MHz and 2400MHz DDR4 speeds, allowing it to replace slower registered ECC modules in the listed ThinkSystem servers. Adding this 16GB RDIMM increases total memory capacity for virtualization, database or compute tasks that benefit from ECC protection. The jump is worthwhile when the workload demands registered ECC reliability and the platform has free DIMM slots.

How it compares

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

Price $104.99
Cheaper than about 67% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $6.56 per GB
Cheaper than about 60% 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 number2R6D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V

Other versions of this model

5 more in the same range

Questions about this item

What comes in the box and do I need to buy anything else to install this module?

The box contains one 16GB DDR4 2666 CL19 1.2V 288-pin ECC Registered RDIMM. No extra parts or cables are required for installation in a compatible server.

How do I choose between the listed Lenovo ThinkSystem models SD530, SD650, SN550, SN850 and SR530?

Pick the module that matches the exact model label on your server; this part replaces Lenovo part numbers 01AG618, 4X70P98202 and 7X77A01303 across all five systems.

What does the 2666MHz speed rating mean once the DIMM is running in my Xeon SP Gen 1 server?

The module operates at 2666MHz CL19 and will also run at 2400MHz or 2133MHz if the platform downclocks it, delivering registered ECC stability at 1.2V.

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