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Four black DDR5 UDIMM modules in a kit

OWC

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

SKU CH-9RS3-YM8JS

A 128GB DDR5 kit of four 32GB modules running at 5600MHz with CL46 latency and 1.1V operation

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 128GB (4 x 32GB)

  • 128 GB total capacity from four 32 GB modules
  • DDR5 5600 speed with CL46 latency for responsive performance
  • 1 V operation reduces power draw and heat
  • JEDEC-standard compliant for warranty-safe upgrades
  • 288-pin unbuffered DIMM fits standard desktop slots

128GB DDR5 5600 Kit for Desktops

This OWC kit delivers 128GB of DDR5 memory across four 32GB modules rated at 5600MT/s with CL46 timings. The unbuffered non-ECC DIMMs operate at the standard 1.1V JEDEC voltage. They are built for desktop, workstation, NAS and all-in-one systems that accept 288-pin DDR5 UDIMMs.

Thermals Noise and Power at 1.1V

Running at the JEDEC 1.1V baseline keeps power draw low and heat output modest. The modules ship without a heat spreader, relying on case airflow for cooling. No active cooling is present, so acoustic impact is zero. Typical workloads stay within the rated voltage without extra thermal measures.

JEDEC Compliance and Lifetime Support

Full JEDEC and RoHS compliance means the kit meets OEM specifications and preserves system warranty coverage. OWC backs the modules with a limited lifetime warranty and an advanced replacement programme. Free technical support is available directly from the manufacturer for installation or troubleshooting assistance.

How it compares

Measured against everything we stock in Desktop RAM, at today’s prices. Recalculated every night.

Price $1,875.99
Pricier than about 90% of the 3,647 comparable items (median $90.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 93% of the 3,251 comparable items (median 16 GB).
Price per GB $14.66 per GB
Pricier than about 86% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number5U6D52R8128S
Total capacity128 GB (4 × 32 GB)
Product colorBlack
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 288-pin DDR5 modules and what step is often missed?

Align the notch on each 288-pin DIMM with the slot key, press firmly until both side clips click, then enable the 5600 speed in BIOS — the XMP/EXPO step is the one most people forget.

What maintenance or replacement will the 128 GB kit need later?

No routine maintenance is required; the modules run at 1.1 V without a heat spreader, so keep case airflow clear and replace only if a module fails.

What limit appears first during sustained heavy workloads?

The CL46 latency at 5600 MT/s sets the throughput ceiling before voltage or thermal limits become a factor.

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