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Two black DDR4 UDIMM modules without heat spreaders

OWC

OWC 64GB (2x32GB) DDR4 3200MHz CL22 desktop RAM

SKU CH-78JJ-00NSZ

Dual-channel kit of two 32 GB DDR4 3200 MHz CL22 unbuffered UDIMMs at 1.2 V, 288-pin, non-ECC

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 64GB (2 x 32GB)

  • 64GB total capacity from two 32GB modules for heavy multitasking
  • DDR4 3200MHz speed rated at PC4-25600 bandwidth for fast data rates
  • CL22 CAS latency at 1.2V standard voltage for efficient operation
  • 288-pin unbuffered non-ECC UDIMM design fits standard desktop slots
  • 100% JEDEC compliant and RoHS certified for warranty-safe upgrades

64GB DDR4 3200MHz Kit

This OWC kit delivers 64GB of desktop memory as two 32GB UDIMMs. It runs at 3200MHz with CL22 latency and 1.2V operation. The modules are non-ECC and unbuffered, built to JEDEC specifications for broad compatibility. They suit users who need high capacity for multitasking or large files.

Dual-Channel 288-pin UDIMM

The pair installs in matching motherboard slots to enable dual-channel bandwidth. Each stick uses the standard 288-pin DDR4 form factor and requires no heat spreader or extra clearance. No additional power connectors or cooling are needed beyond the slot supply. The kit frees the builder from mixing capacities or speeds.

Sustained JEDEC Compliance

All modules are tested to meet JEDEC PC4-25600 timing at 3200MHz under continuous load. The 1.2V rating keeps power draw steady during extended sessions. CL22 latency remains consistent without voltage scaling. This stability supports long renders, virtual machines or compile jobs without throttling.

How it compares

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

Price $349.99
Pricier than about 78% of the 3,647 comparable items (median $90.99).
Total capacity 64 GB (2 × 32 GB)
Higher than about 90% of the 3,251 comparable items (median 16 GB).
Price per GB $5.47 per GB
Cheaper than about 66% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number3U2D42R8064P
Total capacity64 GB (2 × 32 GB)
Product colorBlack
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

Will these two 32GB modules fit my motherboard's 288-pin DDR4 slots?

Yes, each stick is a standard 288-pin UDIMM that plugs into any desktop DDR4 slot.

Can I add this 64GB kit to the 32GB DDR4 3200 memory I already have?

You can install them together, but all modules will run at the speed and timings of the slowest kit.

Does this kit need a heat spreader or active cooling to run at its rated speed?

No, the modules operate at the standard 1.2V JEDEC voltage without a heat spreader.

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