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Green rectangular circuit board with 288 gold contacts and black memory chips, no heat spreader

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 8Rx4 288-pin 1.2V ECC Registered RDIMM memory upgrade Cisco UCS C480 ML M5

SKU CH-4DXE-NZQTS

128 GB DDR4-2933 ECC registered RDIMM adds high-capacity, error-correcting memory to Cisco UCS C480 ML M5, C480 M5, C240 M5, C220 M5 and B480 M5 servers

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS Latency21
  • Voltage1.2V
  • ECCYes
  • 128GB capacity expands server memory for heavy workloads
  • DDR4 2933 speed with CL21 latency delivers responsive data handling
  • ECC registered design detects and corrects errors for data integrity
  • 2V operation reduces power draw in dense configurations
  • Compatible with Cisco UCS C480 ML M5 and other listed servers

Server ECC RDIMM upgrade

This 128GB DDR4 2933 registered DIMM adds ECC error correction to compatible Cisco UCS servers and workstations. It runs at 1.2V with CL21 latency and an 8Rx4 organisation. The module is designed for systems that require registered memory and cannot accept unbuffered or load-reduced types.

Sustained workload behaviour

Registered buffering reduces electrical load on the memory controller during continuous operation. ECC circuitry detects and corrects single-bit errors without halting the system. JEDEC-standard timings at 2933 MT/s maintain stability across extended compute cycles in multi-socket configurations.

DDR4 interface limits

The DDR4 bus tops out at 2933 MT/s for this module, with backward compatibility at 2666, 2400 and 2133 MT/s. Registered DIMMs must populate slots that support registered signalling; they will not function in desktop boards wired for unbuffered memory. Capacity per slot is fixed at 128GB.

Points forts

  • 128GB capacity expands server memory for heavy workloads
  • DDR4 2933 speed with CL21 latency delivers responsive data handling
  • ECC registered design detects and corrects errors for data integrity
  • 2V operation reduces power draw in dense configurations
  • Compatible with Cisco UCS C480 ML M5 and other listed servers

Caractéristiques

BrandOWC
Part Number2R9D48R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS Latency21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank8Rx4
Heat SpreaderNo
Compatible SystemCisco UCS C480 ML M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

Questions sur cet article

How much heat and power does this 128GB DDR4 2933 ECC Registered module draw when the server runs continuously?

The module operates at 1.2V standard DDR4 voltage with no heat spreader. Registered ECC DIMMs of this density typically draw a few watts each under load; the Cisco UCS chassis fans are designed to cool fully populated memory banks at this voltage.

What must the buyer already own for this 288-pin RDIMM to function?

A compatible Cisco UCS server — C480 ML M5, C480 M5, C240 M5, C220 M5 or B480 M5 — with free 288-pin DDR4 RDIMM slots and a BIOS that supports 128GB 8Rx4 modules at 2933 MT/s.

Will this 2933 MT/s CL21 8Rx4 module work alongside existing 2133, 2400 or 2666 MT/s DDR4 RDIMMs in the same Cisco UCS server?

Yes, the module is backward compatible with 2133, 2400 and 2666 MT/s speeds. All installed DIMMs will run at the lowest common speed and must be ECC Registered; mixing with Unbuffered or Load-Reduced memory is not supported.

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