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Eight black DDR5 UDIMM sticks without heat spreaders

OWC

OWC 128GB (8x16GB) DDR5 5200 CL42 ECC Unbuffered UDIMM desktop RAM

SKU CH-QC4C-AJS5H

128 GB kit of eight 16 GB DDR5 5200 CL42 ECC unbuffered UDIMMs at 1.1 V for workstations and servers

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 5200 (PC5 41600)
  • CAS latencyCL42
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 128GB (8 x 16GB)

  • 128 GB total capacity from eight 16 GB modules
  • ECC unbuffered design detects and corrects single-bit errors
  • JEDEC-standard DDR5 5200 CL42 at 1.1 V
  • 288-pin UDIMM form factor fits compatible workstations and servers
  • Dual-channel kit layout simplifies installation in supported systems

128GB DDR5 ECC Kit for Workstations

This 128GB kit contains eight 16GB DDR5 5200 modules rated at CL42 latency and 1.1V. It is built for desktop workstations, servers and NAS systems that require error-correcting memory. The unbuffered design fits standard 288-pin UDIMM slots.

JEDEC-Compliant Unbuffered UDIMMs

Each module follows JEDEC and RoHS standards and carries no heat spreader, keeping the profile low for dense server chassis or compact workstation boards. The black PCB and standard 288-pin edge connector allow straightforward installation in any compatible DDR5 UDIMM slot without clearance issues.

ECC Unbuffered at 5200 MT/s

The combination of ECC protection and unbuffered signalling at 5200 MT/s is the specification that determines whether this kit matches your platform. Only systems that explicitly support DDR5 ECC UDIMMs at this speed and voltage will operate correctly.

How it compares

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

Price $3,606.99
Pricier than about 90% of the 3,647 comparable items (median $90.99).
Total capacity 128 GB (8 × 16 GB)
Higher than about 93% of the 3,251 comparable items (median 16 GB).
Price per GB $28.18 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 number5E2D51R8128K
Total capacity128 GB (8 × 16 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

Will this 128GB kit run at 5200MHz on my workstation motherboard?

The modules are rated for 5200MHz CL42 at 1.1V. Your motherboard must support DDR5 ECC unbuffered UDIMMs and have eight 288-pin slots to use the full kit at that speed.

Do I need a CPU that supports ECC memory for this kit to work?

Yes. ECC unbuffered DIMMs require a processor and chipset that explicitly support ECC. Without that support the system will either disable ECC or fail to post.

Can I mix these 16GB modules with the 8GB sticks already in my server?

Mixing capacities is not recommended. For stable dual-channel operation across all eight slots, populate every slot with identical 16GB modules from this kit.

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