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Green 288-pin DDR4 ECC registered DIMM module with black chips

OWC

OWC 32GB DDR4 2666MHz ECC Registered RDIMM Memory Upgrade for Lenovo ThinkStation P720 P920

SKU CH-FZDK-ZSYEM

32GB DDR4 2666MHz ECC registered RDIMM for Lenovo ThinkStation P720 and P920 workstations

  • Total capacity32 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • 32 GB capacity expands workstation memory for larger datasets
  • ECC registered design detects and corrects single-bit errors for data integrity
  • 2666 MHz DDR4 speed with CL19 latency matches system specifications
  • 2 V operation reduces power draw compared to higher-voltage modules
  • Compatible with Lenovo ThinkStation P720 and P920 replacing part numbers 4X70P98203 and 7X77A01304

32GB DDR4 ECC Registered Upgrade

This 32GB DDR4 2666MHz ECC Registered RDIMM from OWC is built for Lenovo ThinkStation P720 and P920 workstations. It delivers 32GB of capacity at PC4-21300 speed with CL19 latency and 1.2V operation. The module uses a 288-pin registered design with 2Rx4 organisation for server-class reliability.

Workstations needing registered ECC

Suited for ThinkStation P720 and P920 owners who require registered ECC memory for error correction and system stability. Not for standard desktop PCs or consumer motherboards that accept only unbuffered non-ECC modules. Cannot be mixed with unbuffered memory in the same system.

Registered ECC RDIMM form factor

The decisive specification is the registered ECC RDIMM form factor with 288 pins and 1.2V DDR4 signalling. This module fits only platforms that support registered ECC DDR4; it will not work in slots wired for unbuffered or non-ECC memory.

How it compares

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

Price $191.99
Cheaper than about 59% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $6.00 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R6D42R432 GB
Total capacity32 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo ThinkStation P720
Lenovo ThinkStation P920

Other versions of this model

5 more in the same range

Questions about this item

Does my Lenovo ThinkStation P720 or P920 need to support ECC Registered DDR4 RDIMMs for this 32GB module to work?

Yes, the module is a 288-pin DDR4 ECC Registered RDIMM and will only function in systems that accept registered ECC memory; standard desktop boards cannot use it.

Can I add this 2666MHz CL19 1.2V module alongside existing 2133MHz or 2400MHz ECC Registered DIMMs in my ThinkStation?

The module is backward compatible with 2133MHz and 2400MHz speeds, so it will run at the speed of the slowest installed DIMM when mixed with slower registered ECC memory.

How can I confirm the 32GB 2Rx4 module is detected at 2666MHz with ECC active after installation?

Check the system BIOS or UEFI memory information screen; it should show 32GB, 2666MHz (PC4-21300), CL19, 1.2V, and ECC Registered status for the installed slot.

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