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

OWC

OWC 3R2D48R4128G 128GB DDR4 3200 ECC Registered RDIMM memory upgrade

SKU CH-888Z-K7PW1

A 128GB DDR4 3200 ECC Registered RDIMM module for upgrading compatible ASRock barebone servers

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB capacity in a single module
  • DDR4 3200 speed with CL22 latency
  • ECC registered design for data integrity
  • 2 V operation reduces power draw
  • Validated for ASRock 2U and 4U barebone servers

128GB ECC Registered Server Memory

This single 128GB DDR4 3200 module uses an 8Rx4 registered design with ECC for data integrity. It operates at 1.2V with a CAS latency of 22 and fits 288-pin DIMM slots in compatible ASRock barebone servers.

Sustained Workload Stability

Registered buffering reduces electrical load on the memory controller during continuous operation. ECC corrects single-bit errors in real time, preventing silent data corruption during long compute tasks or virtualization workloads.

DDR4 3200 Interface Limits

The module runs at PC4-25600 speeds and is backward compatible with 2133, 2400, 2666 and 2933MHz bus rates. It cannot be mixed with unbuffered or load-reduced DIMMs and will not function in standard desktop platforms.

How it compares

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

Price $673.99
Pricier than about 55% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB
Higher than about 70% of the 20,941 comparable items (median 32 GB).
CAS latency 22
Typical for this category: the median of 483 items is 22.
Price per GB $5.27 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number3R2D48R4128G
Total capacity128 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latency22
ECC supportYes
Buffer typeRegistered
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsASRock Barebone Server 2U2G-ICX2
ASRock Barebone Server 4U18N-ROME/2T
ASRock Barebone Server 4U36L6E-ICX2/2T
ASRock Barebone Server 4U36L6E-MILAN2/2T
ASRock Barebone Server 4U4G-SPC621D8

Questions about this item

Does the 1.2V DDR4 3200 module run hotter or draw more power than slower DDR4 in a server that runs all day?

It operates at the standard 1.2V DDR4 voltage, so power draw and heat are comparable to other DDR4 modules at the same voltage.

My ASRock 4U36L6E-ICX2/2T has empty slots — do I need a matching 8Rx4 registered DIMM to add this 128GB stick?

Yes, this is a single 128GB 8Rx4 registered ECC RDIMM; the system requires registered ECC memory and cannot mix with unbuffered or load-reduced types.

Will this PC4-25600 CL22 stick down-clock cleanly if my older ASRock 2U2G-ICX2 only supports 2666MHz?

The module is backward compatible with 2133, 2400, 2666 and 2933MHz speeds and will run at the highest speed the platform allows.

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