This sale includes 8 sticks of 4gb RAM listed below.
M393B5270QB0-CMAECC memory, short for Error-Correcting Code memory, is a type of computer memory designed to detect and correct errors that may occur during data storage and retrieval processes. It is commonly used in servers and other mission-critical systems where data integrity is of utmost importance. Unlike non-ECC memory, which is used in consumer-grade devices like desktops and laptops, ECC memory includes additional bits in each memory module to store parity information.
Mixing different ranks of ECC memory is generally not recommended because it can lead to compatibility and stability issues in the server system. The main reasons why you should avoid mixing different ranks of ECC memory are:
Memory Controller Compatibility: Each server's memory controller is designed to handle specific memory configurations, including the number of ranks. Mixing ranks can cause the memory controller to struggle with proper address mapping and memory access, potentially resulting in system crashes or data corruption.
Timing and Speed Mismatch: Different ranks of ECC memory may have varying access timings and speeds. Mixing these modules can lead to timing conflicts and communication issues between the memory modules and the memory controller. As a result, the server's performance may suffer, or it may become unstable.
Error Correction Differences: Different ranks of ECC memory might have distinct error correction capabilities or mechanisms. Mixing them could lead to unpredictable error handling, affecting data integrity and leading to errors that are not adequately corrected.
Electrical Load Imbalance: Memory ranks draw electrical power from the memory controller, and they contribute to the overall electrical load on the system. If ranks with varying electrical characteristics are mixed, it can cause imbalances that might exceed the memory controller's capacity, causing instability or even damage to the memory controller.
To ensure the stability and optimal performance of a server system, it's best to use memory modules with the same rank and specifications. If you need to upgrade the memory, it is advisable to use memory modules from the same manufacturer and with matching ranks to maintain a consistent and reliable memory configuration.
47J0220 IBM 4GB PC3-14900 DDR3-1866MHz ECC Registered 240-Pin DIMM Dual Rank.Technical Specifications for 47J0220ManufacturerIBMManufacturer Part #47J0220Memory TypeDDR3 SDRAMCapacity4GBData Transfer Rate1866MhzPins240 PinBus TypePC-14900Error CorrectionRegistered ECCCycle Time1.07nsCasCL13Memory Clock233MhzRankRank 2Voltage1.5