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

OWC

OWC 128GB (4×32GB) DDR5 5200 CL42 ECC UDIMM desktop RAM

SKU CH-9M6M-WY6TW

A 128 GB DDR5 kit of four 32 GB ECC unbuffered UDIMMs running at 5200 MT/s with CL42 latency and 1.1 V operation

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 128GB (4 x 32GB)

  • 128GB total capacity from four 32GB modules
  • ECC protection guards data integrity in critical workloads
  • DDR5 5200 speed delivers high memory bandwidth
  • Low 1.1V voltage reduces system power draw
  • Unbuffered 288-pin UDIMM fits standard desktop slots

128GB DDR5 ECC UDIMM kit

This OWC kit provides 128GB of DDR5 memory in four 32GB unbuffered UDIMM modules. It is built for workstations, servers and NAS systems that require error-correcting code memory. The modules run at 5200MHz with CL42 latency and operate at 1.1V.

Check DDR5 ECC UDIMM support

Verify that your motherboard or system accepts 288-pin DDR5 unbuffered ECC UDIMMs before ordering. Confirm the platform can run memory at 5200MHz and that it supports a total capacity of 128GB across four slots. Ensure the BIOS is updated to recognise the modules.

Four-module population for multi-channel use

The four sticks populate dual-channel or quad-channel configurations depending on the platform. No heat spreader is fitted, so clearance around the slots remains open. The 1.1V operation keeps power draw low for dense server or workstation builds.

How it compares

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

Price $3,342.99
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 $26.12 per GB
Pricier than about 90% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number5E2D52R8128S
Total capacity128 GB (4 × 32 GB)
Product colorBlack
Performance
Rated speedDDR5 5200 (PC5 41600)
Memory
CAS latencyCL42
ECC supportYes
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Recommended forWorkstations, Servers, and NAS Systems
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

Does the 128GB kit include all four 32GB DDR5 modules or must any be purchased separately?

The kit contains four 32GB DDR5 5200 CL42 ECC unbuffered UDIMM modules, totalling 128GB, so nothing else needs to be bought.

Should I choose the 5200 CL42 version or a different speed for a workstation that needs ECC?

This 5200 CL42 kit is the only ECC unbuffered DDR5 option listed; select it when your platform requires DDR5 5200 with error correction.

What does the 5200 CL42 rating mean once the modules are installed in a desktop?

The memory runs at 5200 MT/s with a CAS latency of 42 cycles at 1.1V, delivering JEDEC-standard DDR5 bandwidth and ECC protection for data integrity.

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