IBM 46C7577 16GB Memory PC2-5300
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46C7577 IBM 16GB Pc2-5300 667Mhz Cl5 Ecc DDR2 SDRAM New

Availability: In Stock
Part Number#: 46C7577
List Price was: $1111.63
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New Bulk Pack

Short Description:
46C7577 16GB 2x8gb Pc2-5300 667Mhz Cl5 Ecc SDRAM Registered Fully Buffered DDR2 Fbdimm Memory Module for Server | Made by IBM | New Bulk Pack
Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days

Product Specifications

The 46C7577 is a memory module used in servers. It is a 16GB 2x8gb DDR2 FBDIMM module made by IBM. This article will explain in detail what these specifications mean and how they affect server performance.

Memory Modules

Memory modules are electronic components that store data temporarily in a computer. They are also known as RAM (Random Access Memory) and are an essential component of any computer system. Memory modules come in different shapes and sizes, but the most common form factor is the DIMM (Dual In-line Memory Module).


DDR2 is a type of RAM that was introduced in 2003. It is an improvement over DDR (Double Data Rate) RAM and offers faster data transfer rates. DDR2 RAM has a maximum speed of 800 MHz and a voltage of 1.8V. DDR2 RAM is also backward compatible with DDR RAM, meaning that DDR2 RAM can be used in systems designed for DDR RAM.

Fully Buffered DIMM (FBDIMM)

FBDIMM is a memory technology that was introduced in 2006. It is an improvement over the traditional DIMM design and is used in server systems. FBDIMM modules have a memory controller chip on the module itself, which helps to reduce the load on the memory controller of the server.

Registered DIMM (RDIMM)

RDIMM is a type of DIMM that includes a register between the memory controller and the DRAM chips. The register helps to reduce the load on the memory controller by buffering the signals between the memory controller and the DRAM chips. RDIMMs are used in servers to reduce the load on the memory controller and improve the performance of the system.


ECC (Error Correction Code) is a type of memory technology that is used in servers. ECC memory is designed to detect and correct errors that occur during data transfer. This helps to ensure that data is stored correctly and is not corrupted during the transfer process. ECC memory is essential in server systems, as it helps to prevent data corruption and improve the reliability of the system.


CL5 is a timing specification that is used in DDR2 RAM. It represents the number of clock cycles that it takes for the RAM to respond to a request from the system. A lower CL number indicates better performance, as it means that the RAM can respond to requests more quickly. CL5 RAM has a latency of 12.5ns, which is relatively fast for DDR2 RAM.


667MHz is the clock speed of the 46C7577 memory module. The clock speed represents the number of times per second that the RAM can transfer data. A higher clock speed indicates better performance, as it means that the RAM can transfer data more quickly.

16GB 2x8GB

The 46C7577 memory module has a total capacity of 16GB. This is the amount of data that the RAM can store at any given time. The memory module is made up of 2x8GB modules, which means that there are two 8GB modules on the memory module.

Server Memory

Server memory is designed to handle the demands of server systems. Servers require large amounts of memory to handle multiple requests simultaneously. They also require memory that is reliable and can handle errors that occur during data transfer. Server memory is often designed with features such as ECC and RDIMMs to ensure that it can handle the demands of the system.

General Information about the IBM 46C7577

  • Manufacturer: IBM
  • Part Number or SKU# 46C7577
  • Product Type: Memory (RAM)
  • Product Name: 16GB Pc2-5300

Technical Information

  • Type: Dram
  • Storage Capacity: 16GB
  • Memory Technology: DDR2 SDRAM
  • Number Of Modules: 2 X 8GB
  • Memory Speed: 667MHZ DDR2-667/PC2-5300
  • Data Integrity Check: ECC CHIPKILL
  • Signal Processing: Registered
  • CAS Latency Timings: Cl5
  • Ram Features: Fully Buffered
  • Platform Support: Bladecenter

Physical Characteristics

  • Dimensions (W X D X H) : 8.89 X 19.81 X 1.91 Cm (3.5 X 7.8 X 0.75 In)
  • Weight: 0.45 Kg (1 Lb)

Contact us or ask for live chat/help if you have any questions about the compatibility of this item to ensure the model's matching features with your current system.

Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days

About New Bulk Pack Products

New Bulk Pack products come with clamshell boxes and do not have any manufacturer warranty. Many times manufacturers disassemble whole units to use parts or pulled from a new system. Typically, this product doesn't come with software or instructions unless indicated and no Manufacturer’s genuine warranty. You can take note these are not brand new products.


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What does ALLHDD.Com warranty cover?

30-days to 3 years warranty:

Replacement or refund. In the case of material defects, we will try to replace the product first. The product will be replaced before the expiration of the original warranty. For any failure of hardware, if we cannot process the replacement of the product(s)/model(s), we will refund the original selling/invoiced price. The shipping costs and sales tax, if any, are non-refundable. ALLHDD retains the right to decide whether the item(s) will process for replacement or refund.

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(a) misuse of hardware; accidental damage; carelessness product(s) damage; shock; temperature beyond the specification of any product; faulty installation; operation; modification of goods;

(b) any misuse outside the instructions in the user manual for any specific product;

(c) damaged caused by other hardware or equipment. The warranty will void if the item is returned with physical damage, damage to the retail box, removed from the box, counterfeit labels/labelled by them, or any modifications of internal and external covers. Data loss or damages to any other equipment we do not cover by our offered warranty.

What is the Manufacturer/Brand Warranty?

In general, a manufacturer's warranty service/support is a written guarantee to the buyer of a product. Its terms assure the replacement or repair of the product, if necessary, within a specified period after the purchase (2-5 years depending on the brand/manufacturer). It is typically included in the price of the product. Products are brand new and sealed and the original manufacturer box is complete with the Manufacturer's genuine warranty. For most of the brand new/retail products that come with the manual and box, exceptions may apply (i.e., Cisco, Juniper Networks).

For the server parts (i.e., Dell, HPE) to get Full coverage of the warranty server must have a full 3- 5 years warranty. However, ALLHDD.COM will cover the warranty duration if any Manufacturer doesn't support the advertised warranty and there is no refund for those.
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Shipping Options and Estimated Delivery Time

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UPS® First Overnight - Saturday
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FedEx Shipping Options:

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FedEx Priority Overnight®
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FedEx First Overnight®
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Worldwide Shipping Options:

UPS®/FedEx® International Economy

Estimated delivery time: 4-7 business days

UPS®/FedEx® International Priority

Estimated delivery time: 2-4 business days

UPS®/FedEx® Ground Shipping Canada

Estimated delivery time: 5-8 business days

Important notes:

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