Hynix HMT351R7EFR4A-H9T8AD 4GB DDR3-1333MHz registered ECC memory module designed for server and workstation environments requiring reliable, low-voltage operation. Part number HMT351R7EFR4A-H9T8AD; 240-pin RDIMM form factor with PC3-10600 (1333 MHz) speed rating, CAS latency 9, and 1.35V operating voltage. Single-rank configuration supports two-socket and four-socket server platforms from Intel Xeon E5 and prior-generation systems, as well as compatible AMD Opteron deployments. ECC (Error Correcting Code) protection and registered buffering provide data integrity for mission-critical applications including virtualization, databases, and high-availability infrastructures. Typical use cases include memory upgrades or replacement modules in enterprise servers, storage appliances, and technical workstations. Refurbished module tested and guaranteed; available via quote.