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Two black 288-pin DDR5 UDIMM modules, no heat spreaders, 64GB kit

OWC

OWC 64GB (2x32GB) DDR5 4800 CL40 1.1V UDIMM desktop RAM

SKU CH-CMWN-77BS4

A 64 GB dual-channel DDR5 kit running at 4800 MT/s with CL40 latency and 1.1 V operation for desktop upgrades

  • Total capacity64 GB (2 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel Kit

Capacity 64GB (2 x 32GB)

  • Dual-channel 64 GB kit expands multitasking headroom
  • DDR5 4800 CL40 timing accelerates data throughput
  • 1 V operation reduces system power draw
  • JEDEC-standard build ensures warranty-safe compatibility
  • 288-pin UDIMM form factor fits standard desktop slots

64GB Dual-Channel DDR5 Kit

This OWC kit supplies 64GB of DDR5 memory across two 32GB unbuffered UDIMMs. It targets desktop, workstation and all-in-one systems that accept standard 288-pin modules. The 1.1V operating voltage matches the JEDEC baseline for DDR5.

Sustained Load Behaviour

JEDEC compliance means the modules run at their rated 4800MT/s and CL40 timings without relying on overclock profiles. Under continuous workloads the fixed voltage and non-ECC design deliver stable throughput for rendering, virtualization or large dataset tasks. No heat spreader is fitted, so case airflow handles thermal management.

Deciding Specification

The 4800MT/s JEDEC speed is the single figure that determines fit. If the platform’s memory controller tops out at 4800MT/s this kit runs natively; if the board only supports lower speeds the modules will down-clock. Verify the motherboard or system manual lists DDR5 4800 support before purchase.

How it compares

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

Price $769.99
Pricier than about 90% 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 $12.03 per GB
Pricier than about 76% of the 3,251 comparable items (median $6.75 per GB).

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Specifications

Product
Brand nameOWC
Part number4U8D52R8064P
Total capacity64 GB (2 × 32 GB)
Product colorBlack
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel Kit
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Other versions of this model

5 more in the same range

Questions about this item

How much heat or noise should I expect from the 1.1 V DDR5 4800 CL40 kit running all day?

The modules operate at 1.1 V with no heat spreader and no onboard fan, so they run silently and add minimal heat inside a desktop case.

What must my motherboard already provide for these 288-pin UDIMMs to work?

A DDR5-compatible desktop board with two free 288-pin unbuffered non-ECC DIMM slots and a BIOS that supports 4800 MT/s JEDEC speed.

Will the CL40 4800 modules run stably alongside older DDR5 sticks I keep installed?

Mixing kits is not guaranteed; the motherboard will default all modules to the slowest common speed and loosest timings, which may be lower than 4800 CL40.

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