Product description Will this work in my desktop computer? No, most desktop PCs do not support ECC memory and instead require Non-ECC memory. This memory is designed for workstations and servers compatible with DDR4 ECC Unbuffered memory. If you’re unsure, contact our support team, we’re happy to help! 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. Can I mix ECC Unbuffered (ECC UDIMM) modules with other ECC types? No, you cannot mix ECC Unbuffered with ECC Registered (RDIMM), Load-Reduced (LRDIMM), or Non-ECC Unbuffered (Non-ECC UDIMM) modules. All installed memory modules must be the same ECC type or your system will fail to boot. What ECC type does my system need and which slots should I use? Refer to your system or motherboard manual for supported ECC types and correct memory channel configuration. Using the wrong type or incorrect slot population can cause boot failures or reduce system stability. Specifications Memory Type DDR4 Form Factor DIMM (288-Pin) ECC Type ECC Unbuffered (ECC UDIMM) Compatible Platforms Workstations and select Server systems compatible with 288-Pin DDR4 ECC Unbuffered DIMM Modules. (**WILL NOT WORK WITH Desktop Computers, Laptop Computers, or PCs**) DDR4 ECC Server Memory DDR4 ECC Unbuffered Buying Options DDR4 ECC Registered Buying Options DDR4 ECC Load Reduced Buying Options DDR4 ECC Unbuffered Buying Options Customer Reviews 4.8 out of 5 stars 83 4.5 out of 5 stars 263 4.7 out of 5 stars 26 4.8 out of 5 stars 83 Memory Type DDR4 DDR4 DDR4 DDR4 Form Factor DIMM (288-Pin) DIMM (288-Pin) DIMM (288-Pin) DIMM (288-Pin) ECC Type ECC Unbuffered ECC Registered ECC Load Reduced ECC Unbuffered Capacity 4GB to 32GB Modules 4GB to 256GB Modules 16GB to 256GB Modules 4GB to 32GB Modules Speeds 2133MHz to 3200MHz 2133MHz to 3200MHz 2133MHz to 3200MHz 2133MHz to 3200MHz Voltage 1.2V 1.2V 1.2V 1.2V Compatible Systems Server, Workstation Server Server Server, Workstation From the brand Previous page A-Tech is a leading brand of Computer Memory (RAM) based in the United States. We offer a vast variety of memory products to solve all your memory needs; from servers to desktop PCs to laptops and more! All A-Tech products are rigorously tested to ensure high quality, dependable performance. Upgrade your system with confidence with A-Tech memory (RAM). What does a memory (RAM) upgrade do? Memory (RAM) gives applications a place to temporarily store data which allows your computer to quickly access information. Using multiple programs/applications at once or doing resource intensive activities (such as video/photo editing, gaming, programming and more) can slow down your system as each compete for a limited amount of memory resource. A RAM upgrade can improve performance by expanding your system's memory capacity allowing your computer to take on more while maintaining a fast and smooth experience. Browse our A-Tech Store Visit the Store What are the different types of memory (RAM)? There are many types of RAM including RD, SD, DDR, DDR2, DDR3, DDR4, and DDR5, with DDR5 being the newest version. All system’s have their own memory requirements and will only support one of those specific types of RAM. For instance, a laptop that requires DDR4 RAM can only support DDR4 RAM. Each type of RAM has different pin sizes and notch locations meaning a DDR3 RAM module will only fit into a DDR3 RAM slot and so on. Refer to your system’s manual to determine the supported RAM specifications What is SODIMM and DIMM, which do I need? Along with RAM types, there are also different Form Factors or physical sizes of RAM. SODIMM (or SO-DIMM) RAM is used in laptops and notebooks and is also commonly used in select All-in-One (AIO) computers, Mini PCs and NAS systems. DIMM RAM is used in Desktops Computers as well as Workstations and Servers. The two sizes are not interchangeable; a DIMM module will not fit into a system that requires SODIMM RAM and a SODIMM module will not fit into a system that requires DIMM RAM. What ECC type memory (RAM) do I need? Non-ECC Unbuffered (or simply Non-ECC): Primarily used in Desktop PCs, Laptops, All-in-One (AIO) computers, & Mini PCs as almost all those system types only support Non-ECC Unbuffered memory ECC Registered: Only used in Servers and select Workstations ECC Load Reduced: Only used in Servers and select Workstations ECC Unbuffered: Only used in Servers and Workstations ECC Fully Buffered: Only used in select Servers that support DDR2 RAM Different ECC types cannot be mixed within the same system, only one type can be used. Next page

Features

• Compatible replacement for Samsung M391A4G43MB1-CTD
• Capacity: 32GB (1x 32GB Module) | Type: DDR4 | Speed: DDR4 2666 MHz ( PC4-21300 / PC4-2666V ) | ECC Type: ECC UDIMM (Unbuffered DIMM) | Rank: 2Rx8 (Dual Rank x8) | Voltage: 1.2V | Pin Count: 288-Pin
• WARNING! This module is ECC UNBUFFERED All modules in your system MUST be the same ECC Type in order to properly function
• All A-Tech modules undergo quality assurance testing to ensure dependable and reliable performance
• A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase

Specifications

ram	32 GB DDR4
memory_speed	2666 MHz
brand	A-Tech
series	A-Tech DDR4
item_model_number	M391A4G43MB1-CTD-ATC
hardware_platform	PC
item_weight	1.28 ounces
package_dimensions	6.7 x 2.3 x 0.4 inches
computer_memory_type	DDR4 SDRAM
voltage	1.2 Volts
manufacturer	A-Tech
asin	B08D6Z1MKN
date_first_available	July 17, 2020