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Eight green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 2R9D41R4128K 128GB (8x16GB) DDR4 2933 CL21 1.2V ECC Registered RDIMM memory upgrade

SKU CH-W63G-NHRF9

Eight 16 GB DDR4-2933 ECC registered RDIMMs at CL21 and 1.2 V for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

  • Capacity128GB (8 x 16GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 128GB (8 x 16GB)

Voir les 2 autres configurations
  • 128 GB total capacity from eight 16 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4 2933 CL21 at 1.2 V for server-grade speed
  • 288-pin RDIMM fits Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Target Systems

This OWC kit delivers 128 GB of DDR4 ECC registered memory across eight 16 GB modules. It is built for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers that require registered DIMMs with error correction. It will not work in standard desktop computers or in systems that only accept unbuffered or load-reduced memory.

Registered ECC Requirement

The single specification that decides fit is the registered ECC RDIMM form factor. Each 288-pin module runs at DDR4 2933 (PC4-23400) with CL21 latency at 1.2 V and a 1Rx4 organisation. Systems that demand unbuffered ECC or LRDIMM modules cannot use this kit, and mixing registered with unbuffered memory is not supported.

Build Integration

The modules slot directly into the 288-pin DDR4 DIMM sockets of the listed Cisco UCS platforms. Backward compatibility with 2133, 2400 and 2666 MHz buses allows the kit to run at the highest speed the platform negotiates. No heat spreaders are fitted, so airflow clearance follows the server chassis design. The kit replaces Cisco part numbers HXMRX16G1RTH and UCSMRX16G1RTH.

Points forts

  • 128 GB total capacity from eight 16 GB modules
  • ECC registered design detects and corrects single-bit errors
  • DDR4 2933 CL21 at 1.2 V for server-grade speed
  • 288-pin RDIMM fits Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5, C480 M5
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Caractéristiques

BrandOWC
Part Number2R9D41R4128K
Capacity128GB (8 x 16GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

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Questions sur cet article

How does the 2933 speed behave once installed in a Cisco UCS server?

The modules run at DDR4 2933 (PC4-23400) with CL21 timing and will down-clock to 2666, 2400 or 2133 MHz if the platform requires a lower speed.

What does the registered ECC RDIMM interface mean for compatibility?

These are 288-pin DDR4 ECC Registered DIMMs (1Rx4); they work only in servers and workstations that support registered ECC memory and cannot be mixed with unbuffered or load-reduced modules.

What physical slot and form factor do the 8 modules need?

Each 16 GB stick is a standard 288-pin DDR4 RDIMM without a heat spreader, so it fits any compatible Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 or C480 M5 memory slot.

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