HP 408854-S21 8GB Memory PC2-5300
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408854-S21 HP 8GB 667mhz Pc2-5300 Ecc DDR2 SDRAM 240-Pin Bulk

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Part Number#: 408854-S21
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Short Description:
408854-S21 8GB 2x4gb 667mhz Pc2-5300 Ecc Registered DDR2 SDRAM 240-Pin Dimm Memory Module for Server | Made by HP | New Bulk Pack

Interface Types of This Product: Pc2-5300 8GB

Product Condition:
New Bulk Pack
Warranty provided by ALLHDD.COM:
90 Days
We are providing specifications below to explain why you should consider purchasing the HP 8GB Pc2-5300 Memory, including a general overview, performance specifications, relevant images, media files, and technical information about the 408854-S21 compatibility.

Details Information

The HP 408854-S21 is a server memory module that is specifically designed for use in HP servers. It is an 8GB module of ECC Registered DDR2 memory, operating at 667 MHz and has a HP part number of 408854-S21.

DDR2 (Double Data Rate 2) is a type of computer memory that improves upon the original DDR memory technology by increasing the memory chip's data transfer rate. This module operates at a speed of 667 MHz, which is slower than DDR3 memory, but it may be more compatible with older systems that do not support DDR3.

ECC (Error Correcting Code) memory is a type of computer data storage that can detect and correct the most common kinds of internal data corruption, by using extra memory bits to detect and correct errors. Registered memory, also known as buffered memory, is a type of memory module that includes a register between the DRAM modules and the memory controller. This can help to improve signal integrity and reduce data errors.

It is also compliant with the 240-pin DDR2 SDRAM standard, which is the standard pinout for DDR2 memory modules, making it compatible with HP servers that use DDR2 memory and support registered memory.

This memory module is intended for use in HP servers or other systems that require high levels of data integrity and reliability, but it may be less performant compared to DDR3. It is likely compatible with HP servers or workstations that use DDR2 memory and support registered memory, but you should check your specific system's documentation or specifications to confirm compatibility before installing this memory module.

HP Server Ram

"HP Server Memory 408854-S21" is a product model number for a specific type of RAM module produced by HP.

"8GB" refers to the amount of memory on the module. This means that the RAM module has 8 gigabytes of storage capacity for data.

"PC2-5300" refers to the type of DDR2 SDRAM memory used on the module. DDR2 is a type of memory that stands for "Double Data Rate 2" and is a technology that is used to increase the speed at which data can be transferred between the memory and the CPU. PC2-5300 DDR2 memory runs at a clock speed of 667 MHz.

"ECC" stands for Error Correction Code and it's a type of memory that can detect and correct memory errors caused by data corruption, heat and power fluctuations.

"667 MHz" refers to the clock speed at which the memory module runs. This is the speed at which the memory module can transfer data between the memory and the CPU.

"DDR2 SDRAM" refers to the type of memory technology used on the module. DDR2 SDRAM is a type of memory that stands for "Double Data Rate 2 Synchronous Dynamic Random Access Memory." It is a technology that is used to increase the speed at which data can be transferred between the memory and the CPU.

"240-Pin" refers to the number of pins and the form factor of the memory module. This type of memory uses a 240-pin DIMM (Dual In-line Memory Module) form factor which is commonly used in desktops and servers.

"Reg" means that is registered RAM, also known as buffered memory, which uses a register between the DRAM modules and the system memory controller to buffer the address and command signals for more reliable operation.


408854-S21 is a part number for a HP 8GB 667MHz PC2-5300 ECC DDR2 SDRAM 240-pin Registered RAM module. Ecc DDR2 SDRAM 240-pin Registered is a type of server memory, It can be used in server and workstation motherboards that have 240-pin DIMM slots and support ECC (error-correcting code) and registered memory. It is important to check if the motherboard of the specific server or workstation is compatible with the specific RAM module, you should check the documentation or specifications of the server or workstation to ensure compatibility.

General Information

Brand Name: HP
MPN: 408854-S21
Type: Memory (RAM)
RAM Type: PC2-5300
Product Name: 8GB DDR2 SDRAM Memory Module
SKU: 408854-S21

Technical Information

Storage Capacity: 8GB
Memory Technology: DDR2 SDRAM
Number Of Modules: 2 X 4GB
Memory Speed: 667mhz DDR2-667/PC2-5300
Signal Processing: Registered
Cas Latency Timings: Cl5
Platform Support: Proliant Server
Form Factor: 240-Pin Dimm

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)


Proprietary HP Proliant Server - Bl25 G2
Proprietary HP Proliant Server - Bl685c
Proprietary HP Proliant Server - Dl385 G2-1
Proprietary HP Proliant Server - Dl365
Proprietary HP Proliant Server - Dl145 G3
Proprietary HP Proliant Server - Dl185 G5
Proprietary HP Proliant Server - Ml150 G5
Proprietary HP Proliant Server - Bl260c G5
Proprietary HP Proliant Server - Bl465c G5
Proprietary HP Proliant Server - Dl365 G5
Proprietary HP Proliant Server - Dl385 G5
Proprietary HP Proliant Server - Dl585 G5
Proprietary HP Proliant Server - Dl785 G5
Proprietary HP Proliant Server - Dl165 G5

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.

PC2-5300 memory

Are you looking for the best PC-5300 modules for your server or PC? Allhdd.com is your one-stop-shop for modules from top brands on the market. We have a wide range of memory kits you can choose from. Browse through our website for the best PC2-5300 modules for all your needs.

Double Data Rate (DDR) stands for Synchronous Dynamic Random-Access Memory (SDRAM). It is the typical type of memory that serves as RAM for almost all modern-day processors.

The DDR2 SDRAM (Double Data Rate 2 SDRAM) is the upgrade to DDR SDRAM. It comes with a four-bit pre-fetch buffer and runs its external data bus at double the DDR SDRAM speed to facilitate a faster performance.

Buying DDR2 SDRAM from allhdd.com is pretty much straightforward if you know the front-bus of your system.

There are a handful of features to look out for when choosing a RAM. Suppose you wanted to decide between RAMs of varying clock speeds. In that case, the RAM with a greater clock speed is better. However, when choosing between RAMs of identical clock speeds, the RAM with lower CAS latency will perform faster. Latency is a measure of how long it takes to collect data from memory. The higher this figure, the greater the latency.

The DDR2 PC2-5300 memory is generally regarded as DDR2-667. Its design and unique features work efficiently with systems featuring a 333MHz front-side bus, rendering a data transfer rate of 667MT/s.

The PC2 5300 RAM has a module bandwidth of 5300MB/s. This bandwidth is the highest amount of data the PC2 5300 transfers every second.

Depending on your preference and budget, there are various PC2-5300 memory kits and sizes you can buy here on allhdd.com. These include 4GB, 8GB, 16GB, 64GB, 32GB, and 128GB memory kits. All units are brand new and available at pocket-friendly prices.

Factors to consider before buying the PC2 modules

Your system's RAM is the single most crucial feature for a flawless performance. Hence, picking one requires some attention to certain factors.

  1. Frequency

You should know the frequency at which your server or computer motherboard operates. It is catastrophic to mount a memory with a lower frequency than the motherboard's minimum frequency. You risk damaging both RAM and your motherboard. Here are the typical speeds for DDR2 SDRAM modules:

PC2-6400 (DDR2-800)

PC2-3200 (DDR2-400 at 3200Mbps throughput)

PC2-8500 (DDR2-1066), and

PC2-5300 (DDR2-667).

  1. RAM Size

Depending on your hardware, the modern-day memory module size ranges from 4GB to 128GB. If your system performs a lot of multitasking daily, you'll need a bigger RAM size. You can buy all memory kits ranging from 4GB, 8GB, 16GB, 64GB, 32GB, and 128GB, 256GB, 512GB, 1TB, and more here on allhdd.com.

  1. DDR Generation

Motherboards that are built to support the newer generation DDR will not work with older generations. Be sure to figure out what works for your PC. A DDR2 memory module will not work on a motherboard that features a DDR3 DIMM slot. The same thing applies to other memory modules and DIMM slots.

  1. Number of Channels

Dual channels are the most preferred choice when it comes to the channel number. Say your PC needs 16GB; in that case, you can take a two 8GB memory kit in dual channel mode.

Allhdd.com offers all the top-range memory modules from well-known brands. You get to save more when you shop on allhdd.com. Enjoy free Ground Shipping on all orders placed within all states in the US. Rest easy; there is expert advice and an information support desk if you get stuck.

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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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