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Black 288-pin DDR5 UDIMM module without heat spreader

OWC

OWC 8GB DDR5 4800 CL40 desktop RAM

SKU CH-AA9B-EQ4G2

An 8 GB DDR5 desktop module running at 4800 MHz with CL40 latency, 1.1 V operation, and 288-pin unbuffered design

  • Total capacity8 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Recommended forDesktops
  • Boosts system responsiveness with 8GB DDR5 4800 speed
  • Low 1.1V voltage reduces power draw and heat
  • CL40 latency supports smooth multitasking
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • 288-pin unbuffered design fits desktop, workstation and NAS

8GB DDR5 4800 Desktop Module

This OWC module provides 8GB of DDR5 memory at 4800 MT/s with CL40 latency and 1.1V operation. It uses a 288-pin unbuffered non-ECC UDIMM form factor. The part is built to JEDEC and RoHS standards as a direct replacement for Micron MTC4C10163S1UC48B. It suits desktop, workstation, NAS and all-in-one systems needing a standard capacity upgrade.

Sustained load behaviour

DDR5 architecture moves data at 4800 MT/s with a single 1Rx16 rank per module. The CL40 timing and 1.1V voltage are JEDEC baseline values, so throughput remains steady during long sessions without relying on overclock headroom. No heat spreader is fitted, so case airflow determines thermal performance under continuous use.

Installation notes

The 288-pin UDIMM slots into any desktop DDR5 socket keyed for unbuffered non-ECC memory. Alignment notch and side clips are the only mechanical steps; no drivers or BIOS toggles are required for JEDEC operation. The most common error is mixing this module with different speeds, ranks or voltages, which forces the system to downclock or fail to POST.

How it compares

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

Price $129.99
Pricier than about 58% of the 3,647 comparable items (median $90.99).
Total capacity 8 GB
Lower than about 60% of the 3,251 comparable items (median 16 GB).
Price per GB $16.25 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 number4U8D51R608 GB
Total capacity8 GB
Product colorBlack
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportNo
Buffer typeUnbuffered
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Recommended forDesktops
More details
LED lightingNone

Questions about this item

How much power does the 8 GB DDR5 4800 CL40 module draw when the system runs all day?

The stick operates at the JEDEC-standard 1.1 V, keeping power draw low during continuous desktop workloads.

What must the motherboard provide for this OWC 8 GB DDR5 4800 CL40 stick to work?

A desktop board with a 288-pin unbuffered DDR5 DIMM slot is required; the module is non-ECC and unbuffered.

Will this DDR5 4800 CL40 module run stably alongside older memory already installed?

The module follows JEDEC DDR5 4800 specifications, so the memory controller will set a common speed and timing for all populated slots.

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