IBM 00D4955 4GB 1x4GB 2Rx8 DDR3-1600 ECC Image

Do you need a larger quantity? Call us at 1-888-352-2298 or chat with one of our sales agents for a quantity discount.

IBM 00D4955 4GB 1x4GB 2Rx8 DDR3-1600 ECC

  • Part Number : 00D4955
  • Brand : IBM

order by 5pm ET M-F for next day delivery
always free ground shipping in USA

  • always free ground shipping
  • always free returns
  • always free 1 year warranty
IBM 00D4955 Manufacturer
IBM 00D4955 Form Factor
Form Factor
IBM 00D4955 Capacity
IBM 00D4955 Memory Speed
Memory Speed
1600 MHz
IBM 00D4955 Pins
240 Pin
IBM 00D4955 Interface

Full IBM 00D4955 Specifications

Brand IBM
Form Factor UDIMM
Capacity 4GB
Memory Speed 1600 MHz
Data Integrity Check ECC
Voltage 1.5v
Rank 2Rx8
Latency Timing CL11
Pins 240 Pin
Memory Technology DDR3
Buffered/Registered Non
Interface Type IDE

IBM 00D4955 Frequently Asked Questions

What does it mean if memory is UDIMM?

If you come across server RAM with a UDIMM (Unbuffered Dual In-Line Memory Module) form factor, get ready to dive into the fascinating realm of memory modules! UDIMMs, my friend, are like the easygoing, laid-back siblings of the memory world, bringing simplicity and efficiency to the party.

The release of UDIMMs can be traced back to the late 1990s and early 2000s, emerging as a popular memory form factor during that time. It was an era when the demand for memory was skyrocketing, as computer systems craved greater capacities to handle increasingly complex tasks. UDIMMs came to the rescue, offering a straightforward, uncomplicated approach to memory integration in servers.

Now, why was the advent of UDIMMs an important technological advancement? Let me enlighten you. UDIMMs revolutionized the memory landscape by eliminating the need for additional buffer or register chips found in other memory types like RDIMMs. They stripped away the extra complexity, like a minimalist artist removing unnecessary embellishments from their masterpiece.

This streamlined design brought several advantages. UDIMMs offered lower latency, meaning that data could be accessed more quickly, enhancing overall system responsiveness. They also consumed less power and generated less heat compared to buffered memory modules. It was like finding the perfect balance between performance and simplicity, creating a harmonious memory environment for servers.

As for the question of which company released UDIMMs first, it's challenging to pinpoint a single entity, as UDIMMs were adopted and produced by various memory manufacturers. Leading players like Micron Technology, Kingston Technology, Samsung Electronics, and others jumped on the UDIMM bandwagon, recognizing its value in meeting the growing memory demands of server systems.

In conclusion, if you encounter server RAM sporting a UDIMM form factor, you've stumbled upon the memory equivalent of a laid-back surfer catching the perfect wave. UDIMMs emerged in the late 1990s and early 2000s as a response to the escalating need for memory in computer systems. Their importance lies in their streamlined design, eliminating the need for additional buffer chips and providing lower latency, reduced power consumption, and cooler operations. While multiple memory manufacturers embraced UDIMMs, companies like Micron Technology, Kingston Technology, and Samsung Electronics were at the forefront of releasing these memory modules. So, let's celebrate the UDIMMs, the chilled-out heroes of server memory, making data flow smoothly without breaking a sweat!

What does it mean if memory is ECC?

ECC, which stands for Error-Correcting Code, refers to a type of memory module that incorporates advanced error-checking and error-correction capabilities. ECC memory goes beyond standard non-ECC memory by providing additional measures to ensure data integrity.

The primary purpose of ECC memory is to detect and correct certain types of data errors that may occur during the operation of a computer system. It achieves this by adding extra bits, known as parity or checksum bits, to each memory word stored in the module.

These extra bits enable the ECC mechanism to identify and automatically correct single-bit errors. If a single bit is flipped or corrupted, the ECC memory can detect the error and rectify it, preventing potential data corruption and maintaining accurate information storage.

ECC memory is particularly prevalent in critical computing systems, such as servers and workstations, as well as in environments where data integrity is paramount, such as scientific or financial applications. By providing an additional layer of error detection and correction, ECC memory significantly reduces the risk of undetected errors that could lead to system crashes, data corruption, or inaccurate calculations.

It's important to note that the utilization of ECC memory requires support from both the motherboard and the memory controller in the system. Not all systems or consumer-grade motherboards offer compatibility with ECC memory, so it's crucial to verify the specifications and requirements before incorporating ECC memory modules into a specific system.

What does it mean if memory runs at 1.5v?

If memory runs at 1.5V, it means that the memory module operates at a voltage of 1.5 volts. The voltage specification is a critical factor in determining the power requirements and compatibility of the memory with the system.

Memory modules running at 1.5V are commonly associated with DDR3 (Double Data Rate 3) memory technology. DDR3 was introduced as an advancement over its predecessor, DDR2, and became widely adopted in computer systems from around 2007 onwards.

The release of 1.5V memory modules, specifically DDR3 modules, was driven by major memory manufacturers such as Samsung, Micron, and Hynix. These manufacturers recognized the need for faster data transfer rates, improved efficiency, and increased memory capacity to meet the demands of evolving computing applications.

DDR3 modules operating at 1.5V voltage became the industry standard for a significant period, offering increased performance and efficiency compared to earlier memory technologies. They were widely used in desktop computers, workstations, and server environments, where higher memory capacities and improved data rates were required.

The 1.5V voltage specification was chosen as an optimal balance between power consumption and performance. While higher voltage levels can offer better stability and overclocking potential, they also tend to generate more heat and consume more power. By operating at 1.5V, DDR3 memory modules aimed to strike a balance between performance and power efficiency.

It's important to note that compatibility with the system's memory controller and motherboard is essential when using 1.5V memory modules. The system's hardware should be designed to support and operate at this voltage to ensure proper functionality.

As technology progressed, DDR3 memory eventually gave way to newer memory technologies such as DDR4 and DDR5, which offered improved performance, higher data transfer rates, and increased efficiency. However, 1.5V memory modules, particularly DDR3, played a significant role in the computing landscape during their prime years, powering a wide range of computing systems with reliable and efficient memory performance.

What does it mean if memory is 240 pin?

If memory is specified as "240 pin," it refers to the physical design and configuration of the memory module.

A 240-pin memory module is commonly associated with DDR2 and DDR3 memory standards. This pin count indicates the number of pins on the module's connector that is used for communication and electrical connections with the motherboard.

The 240-pin configuration is primarily used for DIMMs (Dual In-Line Memory Modules) in desktop and consumer-level systems. These modules are designed to fit into the memory slots on the motherboard.

The pin count determines the compatibility and functionality of the memory module with the corresponding motherboard. In the case of 240-pin memory modules, they are designed to work with systems that support DDR2 or DDR3 memory technology.

It's worth noting that different memory standards and generations, such as DDR4 or future standards, may have different pin counts. However, in the case of a 240-pin memory module, it is commonly associated with DDR2 or DDR3 memory technology used in desktop systems.


Out of 5.0

5 star (86%)
4 star (8%)
3 star (3%)
2 star (0%)
1 star (0%)



of customers that buy from Boost Hardware give them a 4 or 5-Star rating.

December 22, 2022 by Scott Carpenter

"We're a Canadian company who was badly in need of a drive for our server. Wasn't sure how the cross border purchase would go but Scott and his team had us taken care of at a price that couldn't be beaten and with lightning speed and efficiency. We had our drive in just a few days. I would highly recommend this company! Wish there were more out there like them!"

December 27, 2022 by Tobias Griffin

"Easy ordering, rapid delivery, and a user-friendly website. Would suggest to boost hardware to my colleagues."

September 26, 2023 by Rudy Gosyne

"Scott does a great job of taking care of the customer"

September 1, 2023 by lee mazzotta

"Good price, working fine, I really liked how it was packaged. "

July 19, 2023 by Krishna Mohan

"Easy to reach someone over the phone, here in USA and a great followup from Scott. Thanks, Krishna"

June 9, 2023 by James Cherry

"Scott was great "

May 26, 2023 by carlos de la roche

"i ask since the first contsct if the memories are new brand sealed and i receive the memories but dont have original sealed"

May 22, 2023 by Marion Russo

"Their sales team always responds quickly which we really appreciate. "

May 15, 2023 by Earl Herman

"Boost Hardware has always been easy to work with, that's why I keep coming back."

May 12, 2023 by Cooper Hoffman

"We had a good experience with our order, no complaints. "

May 11, 2023 by Everett Mccarty

"Excellent customer service; they got in touch with me right away. They upgraded my next order to free 2-day shipping."

May 10, 2023 by Rudy Flores

"I received everything I ordered. rapid shipment It's good to see someone with stock these days."

May 5, 2023 by Lester Chang

"The item arrived really quickly. Refurbished drive was in excellent condition. Thanks"

March 17, 2023 by Dennis Chen

"We received our order without any issues."

March 15, 2023 by Leonel Hoffman

"It's my second time buying from Boost Hardware, and both the price and shipping options are still the best."

March 14, 2023 by Oren Spencer

"I found exactly what I wanted in stock, at a good price, and with quick shipping. excellent service. Thanks!"

March 13, 2023 by Gail Mosley

"The drives we ordered arrived quickly and were reasonably priced. The checkout process was very easy."

March 8, 2023 by Brett Mccarty

"The sales team at Boost is very responsive. What more is there to ask for?"

March 6, 2023 by Bobbie Irwin

"We were able to purchase 10x HP 782995-001 for 25% less than the next lowest price. Very impressed with the quick shipping and lack of issues."

March 2, 2023 by Hank Stevens

"Excellent value and quick shipment. We purchased 4 SSDs for around half of what they usually cost."

February 28, 2023 by Wilmer Hardy

"Quick shipping and their price was significantly lower than distribution. Super quick order turn around."

February 27, 2023 by Virgilio Fischer

"Excellent experience; I've ordered from BOOST HARDWARE several times and have always been happy with the results."

February 23, 2023 by Hugo Mora

"They offered a reasonable pricing and I received my order very quickly. They'll have my business again."

February 14, 2023 by Elliott Gill

"Excellent value and quality"

February 12, 2023 by Rick Holt

"Good price, shipped fast and they worked!"

Warranty & Support

Here at Boost we got your back on every single purchase big or small!

Did you change your mind and need to cancel your order? ALL Purchase Orders are cancelable until the product is paid for and/or shipped.

Purchasing New and Refurbished IT equipment from Boost Hardware will already put you in front of your competition and help you bottom line as we beat all of our competitors! Take a look for yourself with our Competitive pricing tool Above!!

All of our IT Hardware is tested through an extensive diagnostic process by certified Technicians. We are able to simulate the hardware's capabilities in an accurate environment, allowing us to guarantee that the equipment will be ready for use once it is delivered to you.

Even with our extensive testing procedures, equipment does fail from time to time beyond our control due to shipping or various reasons. Boost Hardware offers a 1 year hardware warranty, replacing any faulty or damaged equipment within the next business day. The RMA process we like to keep VERY simple, so there is no paperwork to fill out! :) We will provide a return label for any parts that you need to ship back on us. That’s it!!

We know that you sometimes cannot wait to get a replacement part or Server up and running, that is why we offer priority overnight delivery next day 10:30AM guaranteed delivery! This way you will receive your order the next morning.