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Green printed circuit board with black memory chips and gold edge connectors

OWC

OWC 16GB DDR4 2666MHz CL19 1.2V 288-Pin UDIMM Alienware Area-51 R3-R7

SKU CH-XR7E-QMRKS

16GB DDR4-2666 CL19 UDIMM module designed for Alienware Area-51 R3 through R7 desktops

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 16 GB capacity expands multitasking headroom for demanding workloads
  • 2666 MHz DDR4 speed matches Alienware Area-51 R3-R7 specifications
  • CL19 latency at 1.2 V delivers efficient standard performance
  • 288-pin UDIMM form factor fits directly into desktop memory slots
  • JEDEC and RoHS compliance ensures warranty-safe upgrade compatibility

Alienware Area-51 R3-R7 DDR4 upgrade

This 16 GB DDR4 module is built for Alienware Area-51 desktops from the R3 through R7 revisions. It installs in a standard 288-pin UDIMM slot and runs at 1.2 V without ECC or buffering. The memory is validated to JEDEC specifications and carries a limited lifetime warranty from the manufacturer.

Buyers matching these exact Alienware models

The kit suits owners of an Area-51 R3, R4, R5, R6 or R7 who want a straightforward capacity increase. Systems that require ECC registered DIMMs or a different pin count cannot use this module. Builders working on any other platform should verify their motherboard specifications before purchasing.

2666 MHz CL19 DDR4 speed rating

The module operates at PC4-21300 with a CAS latency of 19. It is backward compatible with 2133 MHz and 2400 MHz memory controllers, so it will downclock automatically in slower systems. This speed grade is the single specification that confirms whether the part matches the motherboard's supported memory profile.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $83.99
Cheaper than about 70% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $5.25 per GB
Cheaper than about 73% of the 20,941 comparable items (median $8.19 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 number2U6D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 Non-ECC UDIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
CAS latencyCL19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsAlienware Area-51 R3
Alienware Area-51 R4
Alienware Area-51 R5
Alienware Area-51 R6
Alienware Area-51 R7

Other versions of this model

5 more in the same range

Questions about this item

Does my Alienware Area-51 need a free 288-pin DDR4 slot to use this 16GB module?

Yes, the module fits a standard 288-pin DDR4 UDIMM slot; one empty slot is required for installation.

Will this 2666MHz CL19 stick run with my existing 2133MHz or 2400MHz DDR4 modules?

The module is backward compatible with 2133MHz and 2400MHz DDR4 and will operate at the lowest common speed.

How can I confirm the module is running at 2666MHz CL19 after I install it?

Check the memory speed and CAS latency in BIOS or a system-information tool such as CPU-Z to verify 2666MHz and CL19 timings.

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