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Black 8GB DDR5 UDIMM module with gold contacts and black PCB, no heat spreader

OWC

OWC 8GB DDR5 4800 CL40 UDIMM desktop RAM

SKU CH-X758-VD303

8 GB DDR5 desktop module replacing Hynix HMCG66MEBUA081N and HMCG66MEBUA084N at 4800 MHz CL40 1.1 V

  • Total capacity8 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeUnbuffered
  • Recommended forDesktops
  • Boosts desktop responsiveness with 4800 MT/s DDR5 speed
  • Low 1.1 V operation reduces system power draw
  • 8 GB capacity adds headroom for multitasking
  • JEDEC-standard CL40 timing ensures broad compatibility
  • 288-pin UDIMM form factor fits standard desktop slots

8GB DDR5 4800 UDIMM for desktop upgrades

This OWC module provides 8GB of DDR5 memory at 4800MHz with CL40 latency. It uses a standard 288-pin unbuffered DIMM form factor and runs at 1.1V. The non-ECC design targets mainstream desktop, workstation, NAS and all-in-one systems.

JEDEC and ROHS compliance with verified

The stick meets JEDEC specifications and is ROHS compliant, making it a warranty-safe upgrade. OWC validates compatibility against Hynix part numbers HMCG66MEBUA081N and HMCG66MEBUA084N. No heat spreader or LED lighting is included.

Suits users adding capacity to DDR5 platforms

Buyers with DDR5-capable desktops, workstations or NAS units can install this single module to increase memory. Systems requiring ECC, registered DIMMs or speeds above 4800MHz should select different memory.

How it compares

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

Price $122.99
Pricier than about 56% 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 $15.37 per GB
Pricier than about 88% of the 3,251 comparable items (median $6.75 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

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

Will the 1.1V DDR5 module need any firmware updates or capacitor replacements over its lifetime?

The module is a standard JEDEC 1.1V DDR5 UDIMM with no onboard firmware or user-serviceable capacitors, so no scheduled updates or component swaps are required.

What thermal limit appears first when the CL40 4800MHz stick runs at full load for hours?

With no heat spreader, the DRAM packages themselves hit their maximum junction temperature before the PCB or surrounding components become the bottleneck.

How much extra power draw and fan noise does the 8GB 1Rx16 DIMM add during all-day operation?

At the rated 1.1V the module draws only a few watts, adding negligible heat that existing case airflow handles without any audible fan-speed increase.

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