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Single green 288-pin DDR4 RDIMM module, black chips, no heat spreader

OWC

OWC 64GB DDR4 2933 ECC Registered RDIMM 2Rx4 CL21 1.2V 288-pin memory upgrade

SKU CH-91C0-P3PC8

64 GB DDR4-2933 ECC registered RDIMM for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

Show 2 more
  • 64 GB capacity lets you run larger workloads in Cisco UCS servers
  • ECC registered design detects and corrects data errors for server reliability
  • DDR4 2933 speed with CL21 latency matches Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 specs
  • 2 V operation reduces power draw in dense memory configurations
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment

Targeted Server Memory Upgrade

This single 64GB DDR4 2933 ECC Registered RDIMM is built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers. It provides error-correcting, registered memory for workloads that require data integrity and high capacity in supported platforms. The module uses a 2Rx4 organisation and operates at 1.2V.

DDR4 2933 Registered Interface Limits

The RDIMM runs at PC4-23400 with a CAS latency of 21 and is backward compatible with 2133, 2400 and 2666MHz system buses. It cannot be mixed with unbuffered or load-reduced ECC modules, and the registered design prevents use in standard desktop or consumer motherboards that expect unbuffered DIMMs.

Pre-Installation Compatibility Checks

Verify that your Cisco UCS model appears in the supported list and that the system firmware accepts registered ECC DIMMs. Confirm the server has free 288-pin DDR4 slots and that existing modules are also registered ECC to avoid mixing incompatible memory types. No heat spreader is fitted, so ensure airflow meets the chassis requirements.

How it compares

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

Price $407.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.37 per GB
Cheaper than about 62% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsCisco UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

Other versions of this model

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Questions about this item

Should I choose the 64GB module or add multiple smaller modules?

This is a single 64GB DDR4 2933 ECC Registered RDIMM. Add one module per available slot; the server's memory controller determines maximum total capacity.

What does the 2933MHz speed deliver in a Cisco UCS M5 server?

The module runs at DDR4 2933 (PC4-23400) with CL21 latency. In supported Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 systems it operates at the platform's maximum rated memory speed.

How does the 288-pin DDR4 ECC Registered interface limit compatibility?

The 288-pin DDR4 ECC Registered RDIMM fits only server and workstation boards that support registered ECC memory. It will not work in standard desktop boards and cannot be mixed with unbuffered or load-reduced modules.

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