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Eight black DDR5 UDIMM modules without heat spreaders

OWC

OWC 128GB (8x16GB) DDR5 5600 CL46 ECC Unbuffered UDIMM desktop RAM

SKU CH-FDSF-T9M8V

A 128GB kit of eight 16GB DDR5 5600 CL46 ECC unbuffered UDIMMs running at 1.1V for workstations, servers or NAS systems

  • Total capacity128 GB (8 × 16 GB)
  • Rated speedDDR5 5600 (PC5 44800)
  • CAS latencyCL46
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 128GB (8 x 16GB)

  • 128GB total capacity from eight 16GB modules
  • ECC protection detects and corrects single-bit errors
  • DDR5 5600 speed rated at PC5-44800 bandwidth
  • JEDEC-standard 1.1V operation keeps power draw low
  • Unbuffered 288-pin UDIMM fits standard desktop DIMM slots

128GB DDR5 5600 ECC Kit

This kit provides 128GB of DDR5 memory in eight 16GB unbuffered UDIMM modules. It targets workstations, servers and NAS systems that require error-correcting code support for data integrity. Each module operates at 5600MT/s with CL46 latency at 1.1V. The 288-pin form factor fits standard desktop DIMM slots.

Sustained Load Behaviour

JEDEC-standard DDR5 at 5600MT/s maintains rated bandwidth during extended workloads because the modules run at the specified 1.1V without overclocking headroom. ECC circuitry detects and corrects single-bit errors on the fly, preventing silent data corruption during long compute or storage tasks. Unbuffered topology keeps latency low for consistent throughput.

Pre-Installation Checks

Verify that the motherboard or system board explicitly supports DDR5 ECC unbuffered UDIMMs at 5600MT/s. Confirm the CPU memory controller accepts 1Rx8 organisation and 1.1V operation. Ensure all eight DIMM slots are available and that the platform qualifies 128GB total capacity in its memory QVL.

How it compares

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

Price $3,436.99
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 $26.85 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 number5E6D51R8128K
Total capacity128 GB (8 × 16 GB)
Product colorBlack
Performance
Rated speedDDR5 5600 (PC5 44800)
Memory
CAS latencyCL46
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 128 GB kit fit in a standard desktop motherboard with four DDR5 slots?

The kit contains eight 16 GB modules, so a board with only four slots cannot accept the full set. You need a platform that provides eight DDR5 DIMM sockets to use all 128 GB.

Does the memory require a motherboard that supports ECC unbuffered DDR5?

Yes, these are ECC unbuffered UDIMMs. The system must explicitly support ECC unbuffered DDR5; standard consumer boards without ECC support will not utilise the error-correction feature and may not post.

What voltage do the modules run at and is any manual adjustment needed?

Each module operates at 1.1 V, the standard DDR5 voltage. No manual voltage adjustment is required; the SPD will configure the correct setting automatically on a compatible platform.

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