G.Skill
G.Skill F4-2666C18S-16GRS 16GB DDR4 2666MHz SO-DIMM
18in16GB DDR4
Sixteen gigabytes at 2666MHz in a low-profile SO-DIMM — the upgrade that turns a bottlenecked laptop into a capable multitasker.
$249.99*
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*Price sourced from Amazon.com. Last updated:Aug 28, 2026.Price and availability are subject to change — details.
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Overview
Key Features
DDR4-2666MHz (PC4-21300), CL18-18-18-43, 1.2 Volt, Non-ECC, 260 pin, Single Channel
Extreme Performance DDR4 Memory
Optimized compatibility with 6th Gen Intel Core Processors
1.2V Low Voltage Support
Module Height: 30mm / 1.18in
Specifications
Brand
G.Skill
Model
F4-2666C18S-16GRS
Capacity
16GB
Memory Type
DDR4 SO-DIMM
Speed
2666MHz (PC4-21300)
CAS Latency
CL18-18-18-43
Voltage
1.2V
Form Factor
260-pin SO-DIMM
Module Height
30mm / 1.18 in
Channel
Single Channel
ECC
Non-ECC
Frequently Asked Questions
Will this module work in my laptop?
It's compatible with systems that accept a single 260-pin DDR4 SO-DIMM. It was specifically optimized for 6th Gen Intel Core platforms, but it also runs in most DDR4 SO-DIMM slots running at or below 2666MHz. Confirm your laptop's maximum supported speed and slot count before purchasing — the module will downclock to match your system's rated speed if needed.
Is this a single module or a matched pair?
This is a single 16GB module. It operates in single-channel mode on its own. If your laptop has two SO-DIMM slots and you want dual-channel bandwidth, you would need two modules installed together.
What does CL18 latency mean, and does it matter for everyday use?
CL18 means the module takes 18 clock cycles to respond to a read command. At 2666MHz, that translates to roughly 13.5 nanoseconds of latency — acceptable for general computing and productivity workloads. It's not optimized for ultra-low-latency workloads, but for the vast majority of users upgrading from slower or lower-capacity RAM, the capacity gain far outweighs the latency difference.
Does the 30mm module height cause clearance issues inside laptops?
At 30mm (1.18 inches), this module stays within the standard SO-DIMM height spec used in most laptops. Clearance issues are rare with standard SO-DIMM designs, but ultra-thin laptops with modified slot orientations may have restrictions — check your service manual if you're uncertain.
What voltage does this module require?
It runs at 1.2V, which is the standard DDR4 operating voltage. No modified voltage settings or BIOS adjustments are required.
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