627812-S21 HPE 16GB 1333mhz Pc3-10600 DDR3 RAM.

Detailed Speed and Timing Characteristics

This memory module operates with a data transfer rate of 1333 million transfers per second (MT/s), delivering a peak bandwidth of 10.6 GB/s in a single-channel configuration. The PC3-10600 designation refers to the module's total bandwidth capacity of approximately 10,600 MB/s. The memory features standard DDR3 latencies and timing parameters optimized for server workloads, balancing performance with reliability requirements typical in enterprise environments.

DDR3 Server Memory Technology

DDR3 vs. Previous

DDR3 technology represents a significant evolution from DDR2, offering higher speeds, improved bandwidth, and reduced power consumption. The HPE 627812-S21 operates at 1333MHz, which is 66% faster than the mainstream DDR2-800 modules while consuming approximately 30% less power due to the lower operating voltage of 1.5V compared to DDR2's 1.8V. The prefetch buffer was doubled from 4 bits to 8 bits in DDR3, enabling higher data transfer rates without increasing the memory cell frequency.

Technical Innovations in DDR3

DDR3 introduced several technological improvements including asynchronous RESET, programmable CAS Write Latency, and improved I/O calibration. The architecture features a more sophisticated write leveling and read/write calibration system that compensates for signal timing variations caused by motherboard layout differences. These advancements make DDR3 particularly well-suited for server environments where multiple memory modules operate simultaneously across different memory channels.

Registered DDR3 Memory Benefits

Registered memory, also known as buffered memory, incorporates memory registers between the memory controller and DRAM chips. These registers temporarily hold data and command signals for one clock cycle before forwarding them to the memory chips. This buffering action reduces the electrical load on the memory controller, allowing systems to support significantly more memory modules than would be possible with unbuffered memory. For the HPE 627812-S21, this means reliable operation in systems with large memory capacities exceeding 100GB.

ECC Technology and Data Integrity

Error Correcting Code Fundamentals

The HPE 627812-S21 incorporates ECC (Error Correcting Code) technology, which detects and corrects single-bit memory errors in real-time. ECC memory includes extra memory bits that store encrypted codes, enabling the memory controller to verify data integrity during read operations. When a single-bit error is detected, the ECC circuitry automatically corrects the error without interrupting system operation or requiring user intervention. This capability is crucial for servers running critical applications where data corruption could have severe consequences.

Multi-Bit Error Detection

While ECC primarily corrects single-bit errors, it also detects multi-bit errors, though it cannot correct them. When the memory controller identifies a multi-bit error, it typically triggers a system event or alert, allowing administrators to take corrective action before data corruption affects system stability. The HPE 627812-S21 implements advanced ECC algorithms that provide comprehensive protection against both soft errors (caused by cosmic rays or electrical interference) and hard errors (resulting from physical memory defects).

Memory Configuration Guidelines

For optimal performance, HPE recommends installing memory in identical pairs or sets matching capacity, speed, and technology. The HPE 627812-S21 should be installed in white memory slots first, following the population rules specified in the server documentation. Maximum memory capacity varies by server model, with Gen8 servers typically supporting up to 768GB or 1.5TB depending on the specific configuration. Mixed memory configurations with different speeds or capacities may operate at the speed of the slowest module.

Enterprise Server Environments

The HPE 627812-S21 is ideally suited for database servers running Microsoft SQL Server, Oracle Database, MySQL, or other database management systems. In these environments, the combination of ECC protection and registered architecture ensures data integrity during intensive transaction processing. The 16GB capacity per module allows for substantial total memory configurations, enabling large database caching that significantly improves query performance and reduces I/O latency.

Enterprise-Grade Reliability Features

HPE subjects the 627812-S21 memory modules to extensive testing that exceeds standard industry practices. This includes temperature cycling tests, extended burn-in periods, compatibility testing across multiple server platforms, and signal integrity validation at extreme operating conditions. This rigorous testing ensures the memory can withstand the demanding 24/7 operation typical of enterprise server environments with minimal failure rates.

ProLiant Server Compatibility

The HPE 627812-S21 is compatible with numerous HPE ProLiant server generations, including the G7, G8, and selected G9 series. Specific compatible models include ProLiant DL380p Gen8, DL360p Gen8, DL380e Gen8, DL360e Gen8, and their Gen7 predecessors. The memory is also supported in HPE ProLiant BL-series blade servers including BL460c Gen8 and BL660c Gen8. Always verify compatibility with the specific server model and existing memory configuration before.