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Samsung 8GB DDR4 PC4-21300, 2666MHZ, 288 PIN DIMM, 1.2V, CL 19 desktop ram memory module

Samsung 8GB DDR4 PC4-21300, 2666MHZ, 288 PIN DIMM, 1.2V, CL 19 desktop ram memory module

Bottom line: The Samsung 8GB DDR4 PC4-21300: Standard 1.2V DDR4 operation with no BIOS voltage tweaks required; main trade-off: CL19 timings are loose compared with enthusiast DDR4 kits.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

Pros & Cons

Pros

  • ✓ Standard 1.2V DDR4 operation with no BIOS voltage tweaks required
  • ✓ 2666MHz (PC4-21300) matches the rated memory speed of many DDR4 platforms
  • ✓ Single 8GB stick for adding capacity or replacing one failed module
  • ✓ Standard 288-pin desktop DIMM form factor fits any DDR4 desktop slot

Cons

  • ✗ CL19 timings are loose compared with enthusiast DDR4 kits
  • ✗ 2666MHz trails the DDR4-3200 and faster kits that gaming builds prefer
  • ✗ Sold as one stick, so dual-channel mode requires buying a second module
  • ✗ Listing does not state ECC, buffering, or heatspreader details

Manufacturer description

The Samsung 8GB DDR4 PC4-21300 module is a single 288-pin DIMM for desktop PCs. It runs at 2666MHz with CL19 timings on a standard 1.2V supply. If your motherboard has a free DDR4 slot, this stick lets you add capacity or replace a failed module. You don't pay for overclocking headroom you may never use. That matters for memory, where dead-on-arrival sticks and random instability are the most common complaints. The listing describes this Samsung module as a proven DRAM solution built to deliver solid performance with low power requirements. 2666MHz and CL19 are baseline speed and timing…

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SpecPicks Verdict

SpecPicks scored Samsung 8GB DDR4 PC4-21300 using a rating × review-volume × price-fit model applied to published specs and reviews across the memory & ram category. Compare with similarly-priced alternatives in the memory & ram category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this Samsung 8GB DDR4 stick work in my laptop?

No. It is a 288-pin desktop DIMM. Laptops use the shorter SO-DIMM form factor, so you need a DDR4 SO-DIMM module instead.

Can I use this 2666MHz RAM in a motherboard that supports DDR4-3200?

DDR4 boards generally accept slower DDR4 modules and run them at the module's rated speed, 2666MHz here. Check your motherboard's memory support list to confirm compatibility.

Should I buy one stick or two?

This listing is a single 8GB module. For dual-channel memory bandwidth, install two matching sticks in the slots your motherboard manual recommends, for 16GB total.

What voltage and timings does this module use?

It runs at 1.2V with CL19 timings at 2666MHz (PC4-21300), per the product listing.

Is this Samsung memory ECC, and what warranty does it include?

The listing does not specify ECC support or warranty terms. Check the product listing or Samsung's support site for current details before buying for a server or workstation.

Key Features

  • <p><b>Proven DRAM module solution in the global market</b></p> <p>Samsung's memory modules are designed for a wide range of applications to deliver the best performance with low power requirements.</p

Full Specifications

BrandSamsung
Voltage1.2 volts
RAM Size8 GB
Model NameM378A1K43CB2-CTD
Form FactorDIMM
Memory Speed2666 MHz
Model NumberM378A1K43CB2-CTD
Number of Pins288
Mfr Part NumberM378A1K43CB2-CTD
Memory GenerationDDR4
Compatible DevicesDesktop
Data Transfer Rate2666 MHz
Memory Form FactorUDIMM
Additional FeaturesLightweight
Computer Memory Size8 GB
RAM Memory TechnologyDDR4
Column Address Strobe Latency19

Ready to buy?

Samsung 8GB DDR4 PC4-21300, 2666MHZ, 288 PIN DIMM, 1.2V, CL 19 desktop ram memory module is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Samsung 8GB DDR4 PC4-21300, 2666MHZ, 288 PIN DIMM, 1.2V, CL 19 desktop ram memory module
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