What’s the difference between DDR4 and other types of memory and can I use them interchangeably?

No, DDR4 memory is not compatible or interchangeable with other types such as DDR5, DDR3, and so on. Each memory type uses different slot designs, voltages, and architectures, so your system must support the memory type specifically.

What’s the difference between DIMM and SO-DIMM memory?

DIMM and SO-DIMM represent two different physical sizes of memory. DIMM is the larger type used in standard desktop computers. SO-DIMM is the smaller type used in laptops, mini PCs, and compact systems. They are not interchangeable.

What does "Non-ECC" mean and do I need "ECC" memory instead?

Non-ECC (non-error correcting) memory is required for most laptops and desktops. ECC is typically only used in servers or workstations and is not interchangeable with Non-ECC memory. If your system doesn’t mention ECC support, you need Non-ECC.

How do I know which speed to choose?

Each system has its own max supported speed. If the memory is faster than your system allows, it will automatically downclock to that max speed, meaning it's safe to buy faster memory. To confirm the max supported speed, refer to your system's manual

Is this compatible with my system or computer?

Refer to your system's manual to confirm the supported memory type, capacity, form factor, and ECC support. If you're unsure, contact our support team, we're happy to help you find the exact memory your system needs!

A Tech 16gb Ddr4 2666 Mhz Udimm Pc4 21300 Pc4

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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Description

⚡ Upgrade your rig, own the workflow!

EFFORTLESS UPGRADE - Simple, no-expertise installation to elevate your desktop instantly
GENEROUS 16 GB CAPACITY - Handle demanding apps and workflows without breaking a sweat
ROCK SOLID RELIABILITY - Backed by A-Tech’s lifetime warranty and expert tech support
SEAMLESS COMPATIBILITY - Designed for select DDR4 desktops and workstations, meeting JEDEC standards
TURBOCHARGE YOUR WORKFLOW - Boost multitasking and loading speeds with 2666 MHz DDR4 performance

The A-Tech 16GB DDR4 2666 MHz UDIMM is a high-performance, non-ECC desktop RAM module designed to accelerate your system’s speed and multitasking capabilities. Featuring a 288-pin DIMM form factor and operating at a low 1.2V voltage, it ensures efficient power use and broad compatibility with select DDR4 desktops. Easy to install and backed by a lifetime warranty, this module is a reliable upgrade for professionals seeking smooth, responsive computing.

Specifications

ASIN	B07KGMVVDZ
Additional Features	Lightweight
Best Sellers Rank	#34 in Computer Memory
Brand	A-Tech
Column Address Strobe Latency	19
Compatible Devices	Desktop, Workstation
Computer Memory Size	16 GB
Customer Reviews	4.7 out of 5 stars 149 Reviews
Data Transfer Rate	21300 megabytes_per_second
Form Factor	DIMM
Manufacturer	A-Tech Components
Memory Form Factor	UDIMM
Memory Generation	DDR4
Memory Speed	2666 MHz
Mfr Part Number	AT16G1D4D2666NA0N12V
Model Number	AT16G1D4D2666NA0N12V
Number of Items	1
Number of Packs	1
Number of Pins	288
RAM Memory Technology	DDR4
RAM Size	16 GB
Special Feature	Lightweight
Unit Count	1 Count
Voltage	1.2 volts
Warranty Description	Limited Lifetime Warranty Covering Defects In Materials And Workmanship

Reviews

S**E

Good

Perfect

13.08.2026

J**S

A-Tech 16GB DDR4 2666 MHz

works perfectly and is very easy to install

31.07.2026

S**O

Good product, quick delivery, no problems.

Excellent.

2.09.2025

B**E

The important thing to know is that if you have two ram slots you should use two RAM sticks

This company never disappoints. Every time I buy a stick of ram from this company it works perfectly. I popped it in my computer and 5 minutes later Windows is running and it's running better because now I have a dual channel ram instead of single I highly recommend this

19.03.2026

C**R

Works as advertised

Works perfect. Upgraded from 16 to 32 gb with this chip.

11.04.2026

R**X

Worked!

It worked

5.03.2026

A**R

Actualización de memoria

Funcionó muy bien , recomiendo está memoria

29.01.2026

J**E

Good price clocks out great.

Great price and works great in my old gaming rig (Acer G7)

11.01.2026

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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4 days ago

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago