We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Four black DDR4 UDIMM modules without heat spreaders

OWC

OWC 64GB (4×16GB) DDR4 2666 CL19 desktop RAM

SKU CH-YDEA-JZT13

A 64 GB kit of four 16 GB DDR4-2666 CL19 unbuffered UDIMMs running at 1.2 V for desktop PCs, workstations and NAS systems

  • Capacity64GB (4x16GB)
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.2V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • 64 GB capacity with four 16 GB modules for demanding multitasking
  • DDR4 2666 MHz speed rated at PC4-21300 for responsive performance
  • CL19 CAS latency and 1.2 V operation for efficient desktop use
  • Non-ECC unbuffered 288-pin UDIMM fits standard desktop and workstation slots
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible upgrades

Ready for desktop workstations

This kit provides 64GB of DDR4 memory in a matched 4x16GB configuration running at 2666MHz with CL19 latency. It is built for desktop PCs, workstations and NAS systems that need a large capacity upgrade without ECC or registered buffers.

JEDEC standard UDIMMs

Each 288-pin unbuffered DIMM operates at the standard 1.2V and carries no heat spreader or lighting. The modules are fully compliant with JEDEC specifications and ROHS, so they install directly into any compatible DDR4 slot as a warranty-safe upgrade.

DDR4 2666 ceiling

The DDR4 interface tops out at 2666MHz in this kit, with backward compatibility to 2133MHz and 2400MHz speeds. Systems that require faster DDR4 data rates or ECC error correction will need different modules, as this kit is limited to non-ECC unbuffered operation at the rated frequency.

Highlights

  • 64 GB capacity with four 16 GB modules for demanding multitasking
  • DDR4 2666 MHz speed rated at PC4-21300 for responsive performance
  • CL19 CAS latency and 1.2 V operation for efficient desktop use
  • Non-ECC unbuffered 288-pin UDIMM fits standard desktop and workstation slots
  • Backward compatible with 2133 MHz and 2400 MHz systems for flexible upgrades

Specifications

BrandOWC
Part Number2U6D42R8064S
Capacity64GB (4x16GB)
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.2V
ECCNo
Buffered/RegisteredUnbuffered
Multi-channel KitDual Channel Kit
ColorBlack
Heat SpreaderNo
Recommend UseDesktops
LED ColorNone

Questions about this item

What DDR4 speed does the 2666MHz kit run at in practice?

The modules operate at DDR4 2666 (PC4-21300) with CL19 latency and will also run at 2133MHz or 2400MHz if the platform requires it.

Will the 4×16GB sticks fit a standard 288-pin desktop board?

Yes, each module is a 288-pin unbuffered UDIMM without a heat spreader, so they fit standard desktop DIMM slots.

How do I install the kit and what step is often missed?

Power off, open the case, align the notch on each 288-pin UDIMM with the slot key, press firmly until the retention clips click, then enable the 2666MHz speed in the BIOS.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.