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Green rectangular DDR4 RDIMM circuit board with gold edge connectors and black memory chips, no heat spreader

OWC

OWC 128GB DDR4 2933 ECC Registered RDIMM CL21 8Rx4 1.2V 288-pin memory upgrade

SKU CH-KRJ7-K1V6K

A single 128GB DDR4 2933 ECC registered RDIMM for compatible ASRock server and workstation platforms

  • Capacity128GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS Latency21
  • Voltage1.2V
  • ECCYes
  • 128 GB capacity expands server memory headroom
  • ECC registered design protects data integrity in critical workloads
  • DDR4 2933 speed with CL21 latency matches OEM specifications
  • 2 V operation reduces power draw per module
  • Compatible with ASRock 1U, 2U and 4U barebone servers

Server-grade DDR4 ECC RDIMM

This 128GB DDR4 2933 module is an ECC registered RDIMM built for ASRock Open 19 and select 4U or 2U barebone servers. It targets administrators who need a single high-capacity stick to expand memory in compatible workstation or NAS platforms.

Installation notes for registered memory

The 288-pin DIMM seats like standard DDR4 but the registered buffer adds electrical load; the motherboard must support registered ECC and the specific 8Rx4 organisation. Mixing this stick with unbuffered or load-reduced modules will prevent the system from posting.

DDR4 2933 practical limits

The module runs at 1.2V and carries a JEDEC PC4-23400 rating with CL21 latency. Backward compatibility covers 2133, 2400 and 2666 speeds, so the stick will down-clock if the platform cannot drive 2933. Maximum capacity per channel and total system memory remain defined by the server board, not by this module.

特長

  • 128 GB capacity expands server memory headroom
  • ECC registered design protects data integrity in critical workloads
  • DDR4 2933 speed with CL21 latency matches OEM specifications
  • 2 V operation reduces power draw per module
  • Compatible with ASRock 1U, 2U and 4U barebone servers

仕様

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 Open 19 1U-Open19-N19 SKU P
ASRock Barebone Server 4U36L2S-C621
ASRock Barebone Server MEC2U-EP2C621D16/4LP
ASRock Barebone Server RM138-C622LM/4L
ASRock Barebone Server RM23712-C622LM/22E

この商品に関する質問

Will the system POST and show 128 GB at 2933 MHz in BIOS after I install this single module?

Yes, the module is tested to JEDEC PC4-23400 2933 MHz CL21 at 1.2 V. After installation the BIOS should report the full 128 GB capacity and the rated speed.

Does the package contain only the 288-pin ECC Registered RDIMM or are any tools or cables included?

The box contains the single 128 GB DDR4 2933 ECC Registered RDIMM. No tools, cables or additional components are supplied.

My server supports both 8Rx4 and 4Rx4 registered DIMMs — which rank should I choose?

This upgrade is an 8Rx4 module. Use it when your platform's qualified vendor list specifies 8Rx4 registered DIMMs; do not mix with 4Rx4 or load-reduced memory.

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