HP 628974-181 16GB 1x16GB 2Rx4 DDR3-1333 CAS-9 ECC Image

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HP 628974-181 16GB 1x16GB 2Rx4 DDR3-1333 CAS-9 ECC

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  • Part Number : 628974-181
  • Brand : HP

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HP 628974-181 Manufacturer
HP 628974-181 Form Factor
Form Factor
HP 628974-181 Capacity
HP 628974-181 Memory Speed
Memory Speed
1333 MHz
HP 628974-181 Pins
240 Pin
HP 628974-181 Interface

Full HP 628974-181 Specifications

Brand HP
Form Factor DIMM
Capacity 16GB
Memory Speed 1333 MHz
Data Integrity Check ECC
Voltage 1.35v
Rank 2Rx4
Latency Timing CL9
Pins 240 Pin
Memory Technology DDR3
Interface Type ATA

HP 628974-181 Frequently Asked Questions

What does it mean if memory runs at 1333Mhz?

When memory runs at 1333MHz, it means that the memory module operates at a frequency of 1333 million cycles per second. The unit "MHz" represents one million cycles per second. In practical terms, the memory can complete 1.333 billion cycles within a single second.

Memory running at 1333MHz is commonly associated with DDR3 SDRAM (Double Data Rate 3 Synchronous Dynamic Random-Access Memory) technology. DDR3 memory, including the 1333MHz variant, was introduced in 2007 as a successor to DDR2 memory.

The 1333MHz memory speed was part of the DDR3 specification, which was developed by JEDEC (Joint Electron Device Engineering Council), an organization responsible for establishing industry standards for semiconductor devices. DDR3 memory brought significant improvements over DDR2, including higher data transfer rates, increased bandwidth, and lower power consumption.

The release of 1333MHz memory marked a notable advancement in memory technology at the time, offering improved performance and efficiency compared to its predecessor. It became a popular choice for mainstream computer systems and found widespread adoption in various applications.

It's important to consider that memory technology has continued to progress since the release of 1333MHz memory. DDR4 memory, for instance, has since been introduced, providing even higher clock speeds and enhanced performance. However, 1333MHz memory may still be found in systems that are compatible with DDR3 memory or in specialized applications that do not require the higher speeds offered by newer memory technologies.

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 accurately assess the memory's capabilities and performance.

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 CL9?

CL9 refers to the CAS Latency timing of a computer memory module, specifically DRAM (Dynamic Random Access Memory). CAS Latency (CL) is a measure of the delay between the time when a memory controller requests data from memory and the time it receives the data. In simpler terms, it's the number of clock cycles it takes for the memory module to provide the requested data after being given the command.

A CL9 memory module, therefore, has a CAS Latency of 9 clock cycles. Lower CAS Latency values are generally better because they indicate that the memory can respond more quickly to memory requests from the processor, resulting in improved overall system performance. However, it's important to note that CAS Latency is just one aspect of memory performance, and other factors like memory frequency (measured in MHz or GHz) also play a role in determining the overall performance of the memory module.

Memory modules with CL9 timings were available in the early 2010s. Around that time, DDR3 memory was popular, and CL9 timings were considered relatively good for mainstream computing and server applications. The release of memory with lower CAS Latency values, such as CL7 or CL8, represented advancements in memory technology, as it indicated improved responsiveness and efficiency in data access, leading to better overall system performance, particularly in tasks that involve frequent memory access, such as gaming, video editing, and server operations.

While CL9 itself wasn't a groundbreaking technological advancement, it was part of the ongoing evolution of memory technology. As processors became faster and more capable, memory modules needed to keep up to ensure optimal performance. Lower CAS Latency values, along with higher memory frequencies, allowed systems to operate more smoothly and efficiently, especially when dealing with memory-intensive tasks.

It's worth noting that memory technology has continued to progress, and with the introduction of DDR4 and later DDR5 memory, newer advancements have been made in terms of both CAS Latency and overall memory performance.

What does it mean if memory has a form factor of DIMM?

DIMM stands for Dual In-Line Memory Module. It is a type of memory module used in computers to provide random access memory (RAM). DIMMs are rectangular circuit boards that contain multiple memory chips and have electrical contacts on both sides. They are designed to be inserted into a computer's motherboard, connecting to the memory slots.

DIMM memory modules were first released in the late 1980s and gained widespread adoption in the 1990s. They replaced the older SIMM (Single In-Line Memory Module) technology, which had a single row of electrical contacts. DIMMs offered several important advancements over SIMMs:

  1. Increased capacity: DIMMs allowed for a greater number of memory chips to be installed on a single module, thus increasing the overall capacity of RAM that a computer could support. This enabled computers to handle more demanding applications and perform tasks more efficiently.

  2. Improved data transfer rates: DIMMs supported higher data transfer rates compared to SIMMs. This increase in speed allowed for faster communication between the RAM and the computer's processor, resulting in improved overall system performance.

  3. Enhanced error correction and reliability: DIMM modules introduced error-correcting code (ECC) capabilities, which helped detect and correct memory errors. This was crucial for critical computing environments, such as servers, where data integrity and reliability are paramount.

  4. Compatibility and scalability: DIMMs offered greater flexibility in terms of compatibility and expandability. They could be used across a wide range of computer systems, allowing for easy upgrades and replacement of memory modules as technology advanced.

Overall, the introduction of DIMM technology represented a significant advancement in computer memory. It provided higher capacity, increased speed, improved reliability, and greater compatibility, all of which contributed to enhanced system performance and efficiency. DIMMs have continued to evolve over the years, with various iterations and advancements, such as DDR (Double Data Rate) and its subsequent generations, further improving memory capabilities in modern computer systems.


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