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Green circuit board with black memory chips and gold edge connector

Computer Memory Solutions

Computer Memory Solutions CM2048642666SO 16GB DDR4 2666MHz memory upgrade

SKU CH-3E6J-E1YNY

16 GB DDR4 SO-DIMM running at 2666 MHz with CL19 timing for Dell Latitude 14 (5491), Vostro 15 (7580) and XPS 15 (9570)

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Memory timings19-19-19
  • Rated voltage1.2 V
  • 16 GB capacity lets you run more apps simultaneously
  • 2666 MHz DDR4 speed matches Dell Latitude 5491, Vostro 7580 and XPS 9570 specs
  • CL19 timing and 1.2 V voltage keep power draw low
  • 260-pin SO-DIMM form factor fits the factory memory slots
  • Single 16 GB module leaves the second slot free for future expansion

Targeted 16 GB DDR4 upgrade

This 16 GB DDR4 SO-DIMM module runs at 2666 MHz with CL19 timing at 1.2 V. It is built for Dell Latitude 14 (5491), Vostro 15 (7580) and XPS 15 (9570) laptops that accept non-ECC, unbuffered memory. The single-stick design adds capacity without occupying a second slot.

Fits two-slot DDR4 laptops

The 260-pin form factor slots directly into compatible Dell notebooks that support DDR4 2666 (PC4 21300). Each system listed offers two memory sockets with a 32 GB maximum, so this module leaves the second socket free for a future addition. No heat spreader is included, keeping the profile low for tight chassis clearances.

Single module with lifetime coverage

The package contains one 2Rx8 memory stick backed by a limited lifetime warranty against manufacturing defects when purchased directly from Computer Memory Solutions. A 30-day money-back period is also offered. The supplier uses major-brand chipsets rather than generic modules to reduce compatibility risk.

How it compares

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

Price $89.99
Cheaper than about 69% 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 $5.62 per GB
Cheaper than about 69% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM2048642666SO
Total capacity16 GB
Product type260-Pin DDR4 SO-DIMM
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
Memory timings19-19-19
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell Latitude 14 (5491) Vostro 15 (7580), XPS 15 (9570)
In the box
Included items1Memory Ram Stick

Questions about this item

Does the 2666 MHz speed and CL19 timing hold under sustained workloads?

The module is rated DDR4 2666 (PC4 21300) with CL19 19-19-19 timings; JEDEC standard operation maintains these figures under continuous load.

How much heat and power does a 1.2 V unbuffered SODIMM produce during all-day use?

At 1.2 V the stick draws minimal power and runs without a heat spreader, so thermal output stays low in typical laptop chassis airflow.

Which Dell models must I already own for this 260-pin module to fit?

Compatible systems are Dell Latitude 14 (5491), Vostro 15 (7580) and XPS 15 (9570) with an available SODIMM slot.

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