Best Fully Buffered Memory of 2025

Mike Davis Avatar
Mike Davis
Last Updated: Jan 9, 2025

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Fully Buffered Memory (FB-DIMM) is a type of computer memory module that offers high performance and reliability. It is designed to work with Intel Xeon processors and supports data transfer rates of up to 6.4 Gbps. FB-DIMMs feature a buffer chip that helps to reduce signal noise and improve signal integrity, resulting in faster data access and fewer errors. They also support hot-swapping, which allows for easy replacement of faulty modules without shutting down the system. FB-DIMMs are ideal for high-end servers, workstations, and other demanding applications that require reliable and high-performance memory.

At a Glance: Our Top Picks

A-Tech DDR2 667MHz ECC FBDIMM PC2-5300F Cover #TOP 1
A-Tech DDR2 667MHz ECC FBDIMM PC2-5300F
ftb score rating icon 9.8
A-Tech 32GB Server Kit for Dell PowerEdge Cover #TOP 2
A-Tech 32GB Server Kit for Dell PowerEdge
ftb score rating icon 9.7
CMS 16GB DDR2 5300 ECC Memory Ram Upgrade Cover #TOP 3
CMS 16GB DDR2 5300 ECC Memory Ram Upgrade
ftb score rating icon 9.5

Top 10 Fully Buffered Memory

#TOP 1

A-Tech DDR2 667MHz ECC FBDIMM PC2-5300F

CT2KIT51272AF667-ATC
Multicolor
8 Gb
A-Tech DDR2 667MHz ECC FBDIMM PC2-5300F Cover
A-Tech 8GB Kit (2x4GB) DDR2 667MHz ECC FBDIMM PC2-5300F ECC Fully Buffered DIMM 240-Pin Server RAM Memory Upgrade Modules

A-Tech Server RAM Memory Upgrade is a high-performance memory upgrade designed specifically for servers. It comes in an 8GB kit, consisting of two 4GB modules. With a DDR2 667MHz speed and a PC2-5300F specification, this memory upgrade ensures fast and efficient performance for your server. The DDR2 ECC FBDIMM (Fully Buffered DIMM) technology provides reliable and dependable performance. It is important to note that this memory upgrade is not compatible with desktop or laptop computers, so make sure to verify the supported memory specifications of your system before purchasing. A-Tech offers a lifetime warranty for all orders and provides complimentary United States-based tech support, ensuring a worry-free experience before, during, and after your purchase.

What We Like
High-performance upgrade
Reliable and dependable performance
Lifetime warranty
#TOP 2

A-Tech 32GB Server Kit for Dell PowerEdge

Compatible with Dell Servers
32GB Kit (8x4GB)
A-Tech 32GB Server Kit for Dell PowerEdge Cover
A-Tech 32GB (8x4GB) Server Kit for Dell PowerEdge 1900 1950 1950 III 1955 2900 2900 III 2950 2950 III M600 R900 SC1430 T110 PowerVault NF500 NF600 PC2-5300 DDR2 ECC FB DIMM Fully Buffered Memory Ram

The A-Tech 32GB Server Kit includes 8x4GB PC2-5300 DDR2 ECC Fully Buffered memory, designed for various Dell PowerEdge models and workstations. This genuine A-Tech Memory comes with Toll-Free Technical Support and a Lifetime Warranty.

What We Like
Large capacity of 32GB, which can enhance the performance of your server.
Designed for a wide range of Dell PowerEdge models and workstations, providing versatility.
Genuine A-Tech Memory with Toll-Free Technical Support and Lifetime Warranty, ensuring reliability and peace of mind.
#TOP 3

CMS 16GB DDR2 5300 ECC Memory Ram Upgrade

Computer Memory Solutions
CM512725300FBDIMMX4
16 Gb
CMS 16GB DDR2 5300 ECC Memory Ram Upgrade Cover
CMS 16GB (4X4GB) DDR2 5300 667MHZ ECC Fully BUFFERED DIMM Memory Ram Upgrade Compatible with Dell® Precision Workstation T7400 for Server Only - B104

Upgrade your server's memory with the CMS 16GB DDR2 5300 ECC Memory Ram Upgrade. This fully buffered DIMM memory kit is compatible with the Dell Precision Workstation T7400. With a speed of 667 MHz, this memory module ensures fast and efficient performance for your server. The 4-piece kit provides ample memory capacity for multitasking and heavy workloads. Plus, Computer Memory Solutions guarantees compatibility with the models mentioned. The product comes with a limited lifetime warranty, giving you peace of mind. Enhance your server's performance with the CMS 16GB DDR2 5300 ECC Memory Ram Upgrade.

What We Like
Compatible with Dell Precision Workstation T7400
Fast and efficient performance
Ample memory capacity for multitasking
#TOP 4

A-Tech Components 8GB Kit 2X 4GB Fully Buffered Memory Ram

Compatible with Apple Workstations
8GB Kit (2x4GB)
A-Tech Components 8GB Kit 2X 4GB Fully Buffered Memory Ram Cover
8GB Kit 2X 4GB Fully Buffered Memory Ram Apple MAC PRO Servers and WORKSTATIONS Quad-core and 8-core 2.0 GHz 2.66GHz 3.0GHz Intel Xeon MA356LL/A A1186 PC2-5300 DDR2 ECC FB DIMM Server Memory

The A-Tech Components 8GB Kit 2X 4GB Fully Buffered Memory Ram is a high-quality memory upgrade designed specifically for Apple Mac Pro servers and workstations. With a capacity of 8GB in a kit of 2x4GB modules, this DDR2 ECC Fully Buffered Server Memory provides ample space for your computing needs. The genuine A-Tech Memory ensures reliability and performance. It is compatible with Apple Mac Pro 8-core and Quad-core 2.0 GHz, 2.66GHz, and 3.0GHz (Intel Xeon) workstations. This memory upgrade comes with a lifetime warranty, giving you peace of mind. Upgrade your Apple Mac Pro system with this A-Tech Components 8GB Kit 2X 4GB Fully Buffered Memory Ram for improved multitasking, faster data processing, and smoother overall performance.

What We Like
8GB Capacity
Genuine A-Tech Memory
Compatible with Apple Mac Pro workstations
#TOP 5

Kingston KVR667D2D4F5/2G Memory

KVR667D2D4F5/2G
Gold
2 Gb
Kingston KVR667D2D4F5/2G Memory Cover
Kingston KVR667D2D4F5/2G 2GB 667MHz DDR2 CL5 ECC Fully Buffered Memory

This Kingston memory features a 2GB capacity with 667MHz DDR2 CL5 ECC Fully Buffered Memory. It is designed as a standard 256M X 72 ECC 667MHz 240-pin Fully Buffered DIMM Dual Rank (SDRAM-DDR2, 1.8V, CL5, FBGA, Gold, X4). This product has a high-quality build and is suitable for use in servers that require high-performance computing.

What We Like
High-quality build
Large 2GB capacity
Designed for high-performance computing
#TOP 6

A-Tech 16GB ECC Memory Kit

AM034039
16GB Kit (4 x 4GB)
A-Tech 16GB ECC Memory Kit Cover
A-Tech 16GB ECC Fully Buffered Memory Kit (4 x 4GB) for DELL Precision 490 690 690n R5400 T5400 T7400 Workstation Towers & Rack Mount Servers - ECC FBDIMM DDR2 PC2-5300 667MHz 240-Pin DIMM 1.8V RAM

The A-Tech ECC Memory is a 16GB kit featuring four 4GB DDR2 modules, designed specifically for Dell Precision workstations. This fully buffered memory operates at 667MHz, providing reliable performance for demanding applications. With genuine A-Tech components, you can trust the quality and compatibility with your system. Additionally, the product comes with a lifetime warranty, offering peace of mind for your investment. Whether you’re running complex software or multitasking, this memory upgrade can enhance your workstation’s efficiency and stability.

What We Like
High capacity for multitasking
Reliable performance
Lifetime warranty
Designed for Dell systems
#TOP 7

CMS 16GB DDR2 5300 667MHz Memory Upgrade

Computer Memory Solutions
CM512725300FBDIMMX4
16 Gb
CMS 16GB DDR2 5300 667MHz Memory Upgrade Cover
CMS 16GB (4X4GB) DDR2 5300 667MHZ ECC Fully BUFFERED DIMM Memory Ram Upgrade Compatible with HP/Compaq® Workstation Xw6400 Ddr2 Pc5300 Fully Buff for Server Only - B104

The CMS 16GB DDR2 5300 667MHz Memory Upgrade is a 4-piece kit of Fully Buffered DIMM with 240-Pin, compatible with HP/Compaq® Workstation Xw6400. It guarantees compatibility with models provided in the description and has a limited lifetime warranty when purchased directly from Computer Memory Solutions. With a speed of DDR2-5300, 667 MHz, it provides an upgrade to the computer's memory capacity, improving its overall performance.

What We Like
Compatible with HP/Compaq® Workstation Xw6400
Guarantees compatibility with models provided in the description
4-piece kit of Fully Buffered DIMM with 240-Pin
#TOP 8

Kingston 4GB DDR2 ECC Memory

KVR667D2D4F5/4GI
White
4 Gb
Kingston 4GB DDR2 ECC Memory Cover
Kingston ValueRAM 4GB 667MHz DDR2 ECC Fully Buffered CL5 DIMM Dual Rank x4 Intel Validated Desktop Memory

The Kingston 4GB ECC Memory is designed to enhance your desktop performance. With a speed of 667MHz, this DDR2 module ensures smooth multitasking and efficient data processing. The error-correcting code (ECC) feature helps detect and correct data corruption, providing peace of mind during critical tasks. Its fully buffered design allows for improved stability and reliability, making it ideal for demanding applications. This memory is also Intel validated, ensuring compatibility with a wide range of Intel-based systems. Upgrade your computer with this memory to enjoy better performance and reliability.

What We Like
Enhanced multitasking capabilities
Data corruption protection
Improved stability and reliability
Intel compatibility
#TOP 9

A-Tech 64GB DDR2 Server RAM

Fully Buffered Server RAM
A-Tech 64GB DDR2 Server RAM Cover
64GB Kit (8x8GB) Fully Buffered DDR2 Server Ram/Memory. PC2-5300 667MHz DDR2 DIMM ECC (Fully Buffered) 240 Pin 1.8V

The A-Tech 64GB DDR2 RAM is a powerful memory kit designed for servers, featuring eight 8GB modules that operate at 667MHz. This fully buffered memory ensures stable performance, making it ideal for demanding server applications. With its ECC (Error-Correcting Code) capability, it helps protect your data by detecting and correcting memory errors, enhancing system reliability. Additionally, this memory is compatible with a wide range of servers and motherboards, ensuring a seamless upgrade experience. Plus, it comes with a lifetime warranty, providing you peace of mind regarding your investment.

What We Like
High capacity for servers
Stable performance
Data error correction
Wide compatibility
Lifetime warranty
#TOP 10

CMS 16GB DDR2 5300 ECC Memory

Computer Memory Solutions
CM512725300FBDIMMX4
4 Gb
CMS 16GB DDR2 5300 ECC Memory Cover
CMS 16GB (4X4GB) DDR2 5300 667MHZ ECC Fully BUFFERED DIMM Memory Ram Upgrade Compatible with Dell® Poweredge Sc1430 Ddr2 Fully Buff for Server Only - B104

The CMS DDR2 Memory Upgrade is designed to enhance your server's performance, ensuring compatibility with specific models like the Dell® Poweredge Sc1430. This memory kit consists of four fully buffered DIMMs that provide reliable and efficient data handling. With a speed of 667 MHz, you can expect improved system responsiveness and multitasking capabilities. The product comes with a limited lifetime warranty when purchased directly from Computer Memory Solutions, giving you peace of mind for your investment. Additionally, the appearance may vary, but its performance remains steadfast.

What We Like
Guaranteed compatibility
Improved system responsiveness
Efficient multitasking
Limited lifetime warranty
Buying Guide Image

Frequently Asked Questions (FAQs)

1. How do you check if my RAM is fully buffered?

The design of the computer memory controller dictates whether EDO/FPM RAM must be buffered or unbuffered. You can determine if the EDO/FPM module is buffered by looking at the leads next to the first notch. If the leads are evenly spaced, the module is buffered.

2. What is the difference between registered unbuffered ECC and fully buffered memory?

Fully buffered memory includes ECC functionality but not all ECC is fully buffered. Unbuffered memory is memory that does not include any buffers or registers. It is the memory most commonly used in desktop and notebook computers.

3. Why is unbuffered memory a better choice?

The computer can read data directly from the unbuffered memory banks, making unbuffered memory faster than buffered memory. The control chip built into the unbuffered RAM module assists the memory controller to manage large amounts of RAM.

Editor's Notes

During our fully buffered memory research, we found 48 fully buffered memory products and shortlisted 10 quality products. We collected and analyzed 3,142 customer reviews through our big data system to write the fully buffered memory list. We found that most customers choose fully buffered memory with an average price of $26.53.

The fully buffered memory are available for purchase. We have researched hundreds of brands and picked the top brands of fully buffered memory, including A-Tech, Computer Memory Solutions, Kingston, Kingston Technology. The seller of top 1 product has received honest feedback from 1,238 consumers with an average rating of 4.9.

Written by
Mike Davis Avatar

Mike Davis is a professionally trained electrician with six years of working experience in the electronics industry. He has written an array of web and mobile-based articles for e-magazines and blogs. He loves trying out some novel and popular gadgets and his expertise is in the areas of electronics and computers which is built over many years of working and personal experiences.