HP 8 gigabytes of DDR3 1333 MHz ECC Registered Dual Rank x4 (Refurbished)

Registered memory are equipped with a controller that controls access to individual memory modules and facilitates the work and memory controller on the motherboard or processor. Memory outwardly behaves as a single module - register chip - who cares about writing and reading of individual memory cells, and control passes to the outcome of these operations. This increases the efficiency of memory access and processing speed even when using more memory modules simultaneously. Some server boards require registered memory.

Memory has two separately addressable areas (memory rank). Most server chipsets have limited the number of memory rank or directly to the specified memory configuration for each slot, so you need when buying a watch that figure with respect to future upgrades - when you reach the full number of memory rank on the motherboard, you can not add another module, even if they remained free memory slots.

Memory module with organizations chips "x4" are designed for the most demanding applications, supporting a wide range of professional technologies such as multiple-bit error correction, Chipkill, memory scrubbing or Intel Single Device DataCorrection (SDDC), so they are ideal for critical applications, and critical servers.