8 GB FBD PC2-5300 2 x 4 GB Dual Rank Kit1 Image

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8 GB FBD PC2-5300 2 x 4 GB Dual Rank Kit1

Boost Hardware is a HP 397415-B21 Business Partner
  • Part Number : 397415-B21
  • Brand : HP

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
HP 397415-B21 Manufacturer
HP 397415-B21 Capacity
HP 397415-B21 Bus Speed
Bus Speed
HP 397415-B21 Chip Set
Chip Set
HP 397415-B21 Pins
HP 397415-B21 Memory Type
Memory Type

Full HP 397415-B21 Specifications

Brand HP
Capacity 8GB
Bus Speed 667MHZ
Data Integrity Check ECC
Voltage 1.8v
Chip Set 2Rx4
Pins 240-pin
Memory Technology DDR2 SDRAM
Number of Modules 2x4GB
Memory Type DDR2
MHz 667MHz

HP 397415-B21 Frequently Asked Questions

What does it mean if memory runs at 667Mhz?

When memory runs at 667MHz, it means that the memory module operates at a frequency of 667 million cycles per second. The unit "MHz" represents one million cycles per second. In practical terms, the memory can complete 667 million cycles within a single second.

Memory running at 667MHz is associated with older memory technologies, specifically DDR2 SDRAM (Double Data Rate 2 Synchronous Dynamic Random-Access Memory). DDR2 memory, including the 667MHz variant, was released in 2003 as an advancement over the previous DDR memory standard.

The release of 667MHz memory was part of the DDR2 specification, which was introduced by JEDEC (Joint Electron Device Engineering Council), an organization responsible for developing industry standards for semiconductor devices. DDR2 memory brought improvements in terms of higher data transfer rates, increased bandwidth, and improved efficiency compared to its predecessor.

It's important to note that memory technology has since advanced further, with newer standards such as DDR3 and DDR4 offering higher clock speeds and enhanced performance. However, 667MHz memory may still be found in older systems that are compatible with DDR2 memory or in specialized applications where higher clock speeds are not required.

When evaluating memory capabilities, it's crucial to consider compatibility with the system's specifications and requirements. Additionally, factors such as memory type, timings, and the overall system configuration should be taken into account to assess the memory's capabilities and performance accurately.

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 has a latency of CL5?

In the context of server RAM, "CL5" refers to the CAS Latency (CL) timing of the RAM module. CAS Latency is a critical parameter that affects memory access speed. It is a measure of the delay between the time a memory controller requests data from memory and when the data is actually available for use. Lower CAS Latency values indicate better performance, as they represent shorter delays.

A CAS Latency of 5 (CL5) means that there is a delay of 5 clock cycles before data is accessible after a memory request. In other words, CL5 RAM modules are designed to be faster than RAM modules with higher CAS Latency values, like CL6, CL7, and so on.

Memory modules with lower CAS Latency values were an important advancement in technology because they provided improved data access speeds, leading to better overall system performance. This was especially crucial for server environments, where high-performance memory is essential to handle the demands of numerous concurrent tasks, data processing, and virtualization.

It's worth noting that memory technology has continued to advance since the introduction of CL5 RAM. Newer generations of memory, like DDR3, DDR4, and DDR5, have brought higher data transfer rates and improved efficiency, reducing latency even further and enhancing overall system responsiveness.


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

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May 11, 2023 by Everett Mccarty

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May 10, 2023 by Rudy Flores

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May 5, 2023 by Lester Chang

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

March 17, 2023 by Dennis Chen

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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

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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.