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Eight green DDR3L RDIMM modules in anti-static tray

OWC

OWC 64GB (8x8GB) DDR3L 1600 CL11 1.35V ECC Registered RDIMM 240-pin memory upgrade

SKU CH-CKP5-1MMPV

64 GB DDR3L 1600 ECC registered kit of eight 8 GB modules for Cisco UCS B200 M3, B22 M3, B420 M3, C22 M3 and C220 M3 servers

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR3L 1600 (PC3L 12800)
  • CAS latencyCL11
  • Rated voltage1.35 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB (8 x 8GB)

  • ECC registered design protects data integrity in servers
  • 64 GB kit (8×8 GB) expands Cisco UCS memory capacity
  • DDR3L 1600 CL11 at 1.35 V lowers power draw
  • 240-pin RDIMM form factor fits B200 M3, B22 M3, B420 M3, C22 M3, C220 M3
  • Replaces Cisco part numbers UCSMR1X082RYA, UCSMR2X082RYB, UCSMR2X082RYE

Server memory kit

This OWC kit supplies 64GB of DDR3L ECC Registered memory across eight 8GB modules. It is built for Cisco UCS B200 M3, B22 M3, B420 M3, C22 M3 and C220 M3 servers that require registered DIMMs. The kit will not work in standard desktop computers or in systems that accept only unbuffered or load-reduced modules.

Registered ECC specification

The decisive specification is the registered ECC design with a 2Rx4 organisation. Only platforms that explicitly support registered error-correcting DIMMs can use this memory; mixing it with unbuffered or load-reduced modules will prevent the system from booting.

Sustained operation

Operating at 1.35V with a CL11 latency at 1600MHz, the modules run within JEDEC DDR3L limits for continuous server workloads. The low-voltage design reduces heat output during extended duty cycles, and the absence of a heat spreader relies on chassis airflow for thermal management.

How it compares

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

Price $156.99
Cheaper than about 61% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (8 × 8 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $2.45 per GB
Cheaper than about 92% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1R6T32R4064K
Total capacity64 GB (8 × 8 GB)
Product type240-Pin DDR3L ECC RDIMM
Performance
Rated speedDDR3L 1600 (PC3L 12800)
Memory
CAS latencyCL11
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.35 V
Compatibility
Compatible systemsCisco UCS B200 M3
Cisco UCS B22 M3
Cisco UCS B420 M3
Cisco UCS C22 M3
Cisco UCS C220 M3

Other versions of this model

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Questions about this item

What does the 1600 CL11 rating mean once these modules are installed in a Cisco UCS server?

The 1600 MHz speed and CL11 latency give a peak transfer rate of PC3L-12800 while the registered ECC design corrects single-bit errors and reduces electrical load on the memory controller.

How does the DDR3L 1.35 V registered interface affect compatibility with the listed Cisco UCS models?

The modules use the standard 240-pin DDR3L registered ECC interface at 1.35 V, matching the memory controllers in the B200 M3, B22 M3, B420 M3, C22 M3 and C220 M3 without requiring unbuffered or load-reduced DIMMs.

What physical slot and clearance requirements must the chassis meet for these 240-pin RDIMMs?

Each module is a standard-height 240-pin DDR3L RDIMM with no heat spreader, so it fits any DDR3L RDIMM slot in the compatible Cisco UCS servers provided the DIMM ejectors can fully engage.

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