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Green rectangular DDR4 RDIMM module with black chips on both sides and gold edge connectors

OWC

OWC 128GB DDR4 2933 ECC Registered RDIMM 2R9D48R4128G memory upgrade

SKU CH-NMBJ-FB4AP

A single 128GB DDR4 2933 ECC registered RDIMM for compatible ASRock server motherboards

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS Latency21
  • Voltage1.2V
  • ECCYes
  • 128GB capacity expands server memory headroom
  • DDR4 2933 speed boosts data throughput for demanding workloads
  • ECC registered design detects and corrects errors to protect critical data
  • 2V operation lowers power draw and heat in dense configurations
  • Compatible with multiple ASRock server boards including WC621D8-NL

Server ECC Registered Memory Upgrade

This 128GB DDR4 module is an ECC Registered RDIMM built for ASRock server motherboards including the WC621D8-NL, EP2C622D24LM2, EPC621D4I-2M, EPC621D6U-2T16R and WC621D8A-2T. It is intended for workstations, servers and NAS systems that require registered error-correcting memory. It will not work in standard desktop computers and cannot be mixed with unbuffered or load-reduced modules.

DDR4 2933 Speed and Backward Compatibility

The module runs at DDR4 2933 (PC4-23400) with a CAS latency of 21 and operates at 1.2V. It is backward compatible with systems running at 2133MHz, 2400MHz and 2666MHz, allowing it to downclock automatically when installed in platforms that do not support the maximum rated speed.

Single-Module 128GB Density and 288-Pin Form Factor

A single 8Rx4 rank module delivers the full 128GB capacity, leaving additional DIMM slots free for future expansion. The 288-pin registered DIMM form factor fits standard server memory sockets without a heat spreader, simplifying installation in dense chassis. JEDEC and RoHS compliance ensures a warranty-safe upgrade for qualified ASRock platforms.

Pluspunten

  • 128GB capacity expands server memory headroom
  • DDR4 2933 speed boosts data throughput for demanding workloads
  • ECC registered design detects and corrects errors to protect critical data
  • 2V operation lowers power draw and heat in dense configurations
  • Compatible with multiple ASRock server boards including WC621D8-NL

Specificaties

BrandOWC
Part Number2R9D48R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS Latency21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank8Rx4
Heat SpreaderNo
Compatible SystemASRock Server Motherboard WC621D8-NL
ASRock Server Motherboard EP2C622D24LM2
ASRock Server Motherboard EPC621D4I-2M
ASRock Server Motherboard EPC621D6U-2T16R
ASRock Server Motherboard WC621D8A-2T

Vragen over dit artikel

Should I choose this single 128GB module or multiple smaller modules to reach my target capacity?

This is a single 128GB DDR4 2933 ECC Registered RDIMM. If your ASRock server board has enough 288-pin slots and supports 128GB per slot, one module is the simplest upgrade. Add more identical modules only if you need total capacity beyond 128GB.

What does the 2933MHz speed rating deliver once the module is installed in my ASRock server?

The module runs at DDR4 2933 (PC4-23400) with CL21 latency at 1.2V. On compatible ASRock boards such as the WC621D8-NL it will operate at that rated speed, providing the bandwidth and error-correction expected for registered server workloads.

How does the DDR4 2933 interface limit performance in practice?

The 288-pin DDR4 interface caps transfer rate at 2933 MT/s (PC4-23400). The module is backward compatible with 2133, 2400 and 2666 MT/s buses, so it will down-clock automatically if the motherboard or CPU memory controller cannot run at 2933.

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