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Green bare circuit board DDR4 ECC registered DIMM 288-pin 128GB module

OWC

OWC 128GB DDR4 3200 CL22 ECC Registered RDIMM 3R2D48R4128G memory upgrade

SKU CH-76HS-296QV

A 128GB DDR4 3200 ECC registered RDIMM for Supermicro server and workstation motherboards

  • Total capacity128 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latency22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank8Rx4
  • 128 GB single module expands server capacity
  • DDR4 3200 CL22 delivers high throughput
  • ECC registered design protects data integrity
  • 2 V operation reduces power draw
  • Compatible with Supermicro H11SSL-NC and H12 series

Server-grade memory upgrade

This OWC module delivers 128GB of DDR4 ECC registered memory for Supermicro H11SSL-NC and related server boards. It targets administrators extending the service life of existing infrastructure or building new workstation and NAS systems with a single high-density DIMM.

Registered ECC with 8Rx4 organisation

The stick runs at 3200MHz CL22 (PC4-25600) on 1.2V and uses an 8Rx4 layout across 288 pins. JEDEC compliance and backward compatibility with 2133, 2400, 2666 and 2933MHz buses ensure it will negotiate the highest common speed the platform supports.

Single-slot density for dense configs

Occupying one DIMM slot frees remaining channels for additional capacity without mixing registered and unbuffered or load-reduced modules. The lack of a heat spreader keeps the profile low for tight server chassis, while ECC registration handles error correction for mission-critical workloads.

How it compares

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

Price $759.99
Pricier than about 57% 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 $5.94 per GB
Cheaper than about 66% of the 20,941 comparable items (median $8.19 per GB).

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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 systemsSupermicro Motherboard H11SSL-NC
Supermicro Motherboard H12DGO-6
Supermicro Motherboard H12DSG-O-CPU
Supermicro Motherboard H12DSG-Q-CPU6
Supermicro Motherboard H12DSi-N6

Questions about this item

What does the 3200 CL22 rating mean for actual throughput in a server?

The module runs at DDR4 3200 (PC4-25600) with CL22 latency, providing the JEDEC-standard data rate when the platform operates at that speed.

How does the DDR4 3200 (PC4-25600) interface limit performance in practice?

The DDR4 3200 interface caps the peak transfer rate to the PC4-25600 specification; the module will down-clock to 2133, 2400, 2666 or 2933 MT/s if the motherboard requires it.

What physical slot and clearance does this 288-pin RDIMM need?

It fits a standard 288-pin DDR4 RDIMM socket and has no heat spreader, so it clears typical server DIMM spacing.

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