Random Access Memory (RAM) is a vital component of any computing device. It is responsible for temporarily storing data and instructions that are required by the central processing unit (CPU) to execute tasks. When it comes to servers, which are responsible for serving multiple clients simultaneously, the amount and quality of RAM become even more important. In this article, we will explore in detail the specifications of the HP 408855-S21 16GB DDR2 SDRAM memory module designed for servers.
Product SpecificationsThe HP 408855-S21 is a DDR2 SDRAM memory module designed for servers. It is a dual-rank module, which means that it has two sets of memory chips that are accessed by the CPU separately. The memory module is registered, which means that it has an additional register between the memory module and the CPU, which helps to improve signal integrity and reduce electrical load. This makes registered memory modules more reliable and stable than unregistered ones. The HP 408855-S21 has a capacity of 16GB, which is the total amount of data that can be stored in it. It consists of 2 x 8GB memory chips, which are accessed separately by the CPU.
Clock Speed & LatencyThe HP 408855-S21 has a clock speed of 667MHz. The clock speed determines the number of cycles per second at which the memory module can operate. A higher clock speed means that the memory module can process more data per second. However, the clock speed of the memory module must be compatible with the clock speed of the CPU and the motherboard. If the memory module has a higher clock speed than the CPU and the motherboard, it will not operate at its full potential. Therefore, it is essential to check the compatibility of the memory module with the CPU and the motherboard before installing it.
The HP 408855-S21 has a CAS latency of 5. The CAS latency determines the amount of time it takes for the memory module to respond to a request from the CPU. A lower CAS latency means that the memory module can respond faster to requests from the CPU. Therefore, a memory module with a lower CAS latency is better than one with a higher CAS latency. However, the CAS latency of the memory module must be compatible with the CPU and the motherboard. If the CAS latency of the memory module is not compatible with the CPU and the motherboard, it will not operate at its full potential.
Error Correcting Code (ECC)The HP 408855-S21 has ECC support. ECC is a method of detecting and correcting errors in memory. It works by adding extra bits to the memory module, which are used to detect errors. If an error is detected, the ECC algorithm can correct it before the data is sent to the CPU. ECC memory is essential for servers because they are required to be highly reliable and stable. The ECC feature ensures that any errors in the memory module are detected and corrected before they cause any problems.
Memory RankThe HP 408855-S21 is a dual-rank memory module. The rank of a memory module determines the number of banks of memory chips that are accessible by the CPU. A single-rank memory module has one bank of memory chips, while a dual-rank memory module has two banks of memory chips. The advantage of a dual-rank memory module is that it can provide better performance than a single-rank memory module. This is because the CPU can access two banks of memory chips simultaneously, which can improve the memory bandwidth.
DIMM Form FactorThe HP 408855-S21 is a DIMM (Dual In-Line Memory Module) form factor memory module. A DIMM is a type of memory module that has a printed circuit board with memory chips on both sides. DIMMs are commonly used in servers
Main Specification about the HP 408855-S21- Manufacturer: HP
- Part Number or SKU# 408855-S21
- Device Type: Memory (RAM
- RAM Type: PC2-5300
- Product Name: 16GB DDR2 SDRAM MEMORY Module
- Storage Capacity: 16GB
- Memory Technology: DDR2 SDRAM
- Number Of Modules: 2 X 8GB
- Memory Speed: 667mhz DDR2-667/PC2-5300
- Data Integrity Check: Ecc
- Signal Processing: Registered
- Cas Latency Timings: Cl5
- Platform Support: Proliant Server
- 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)
- HP Proliant Server Series
- Dl785
- Dl585
- Dl385
- Dl185
- Dl180
- Dl165
- Bl685c
- Bl465c
- Bl2x220c
- Bl260c
- HP Proliant Blade Servers
- Bl685c G6
- Bl685c G5
- Bl495c G6
- Bl495c G5
- Bl2x220c G5
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.
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