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Four black DDR5 UDIMM modules, no heat spreaders, 288 pins each

OWC

OWC 128GB (4x32GB) DDR5 5600 CL46 ECC Unbuffered UDIMM desktop RAM

SKU CH-03GQ-GCTAB

A 128 GB kit of four 32 GB DDR5 5600 CL46 ECC unbuffered UDIMMs at 1.1 V for workstations and servers

  • Capacity128GB (4 x 32GB)
  • SpeedDDR5 5600 (PC5 44800)
  • CAS LatencyCL46
  • Voltage1.1V
  • ECCYes
  • Buffered/RegisteredUnbuffered

Capacity 128GB (4 x 32GB)

  • 128GB total capacity across four 32GB modules
  • DDR5 5600 speed with CL46 latency for responsive throughput
  • ECC unbuffered design protects data integrity in workstations
  • 1V operation reduces power draw under load
  • JEDEC and RoHS compliant for warranty-safe upgrades

128GB DDR5 ECC kit for workstations

This kit provides 128GB of DDR5 ECC unbuffered memory in four 32GB modules. It targets workstations, servers and NAS systems that require error-correcting memory for data integrity. The modules run at the JEDEC-standard 5600MT/s speed with CL46 latency. Builders who need non-ECC memory or higher frequencies should look elsewhere.

JEDEC DDR5 5600 baseline limits

The memory operates at the baseline DDR5 5600 (PC5-44800) JEDEC speed grade with 1.1V voltage and CL46 timing. This is the standard specification without XMP or EXPO profiles for automatic overclocking. Platforms that only support lower DDR5 speeds will downclock the modules. Systems requiring registered or load-reduced DIMMs cannot use this unbuffered kit.

ECC unbuffered UDIMM form factor

Each module is a 288-pin 2Rx8 ECC unbuffered DIMM, the defining specification for motherboard compatibility. The motherboard must explicitly support ECC unbuffered DDR5 UDIMMs; consumer boards that disable ECC or require registered DIMMs will not work. No heat spreaders are included, so airflow in the chassis must be adequate for sustained loads.

Highlights

  • 128GB total capacity across four 32GB modules
  • DDR5 5600 speed with CL46 latency for responsive throughput
  • ECC unbuffered design protects data integrity in workstations
  • 1V operation reduces power draw under load
  • JEDEC and RoHS compliant for warranty-safe upgrades

Specifications

BrandOWC
Part Number5E6D52R8128S
Capacity128GB (4 x 32GB)
SpeedDDR5 5600 (PC5 44800)
CAS LatencyCL46
Voltage1.1V
ECCYes
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
ColorBlack
Heat SpreaderNo
Recommend UseWorkstations, Servers, and NAS Systems
LED ColorNone

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Questions about this item

Should I pick the 4x32GB kit or buy individual 32GB modules to reach 128GB?

The 4x32GB kit provides matched modules tested together for stable quad-channel operation on supported platforms.

What does the 5600 CL46 rating mean for actual workload performance?

DDR5-5600 delivers a 5600 MT/s data rate with 46-cycle CAS latency, giving high throughput for memory-intensive tasks like virtualization and large dataset processing.

How does the ECC unbuffered DDR5 interface affect compatibility and speed limits?

The 288-pin ECC unbuffered DDR5 modules run at 1.1V and follow JEDEC PC5-44800 specifications, requiring a platform that supports ECC UDIMMs at 5600 MT/s.

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