OWC 4GB DDR3 1600 PC3-12800 CL11 2Rx8 240-pin 1.5V ECC Unbuffered UDIMM Memory Upgrade

QNAP NAS Memory Upgrade

This 4GB DDR3 1600 module is built for QNAP SS-EC and TS-EC SAS rackmount units. It adds ECC protection to compatible storage servers that need data integrity for critical workloads. The unbuffered design fits the specific memory slots on the listed models. Buyers who need higher capacities or registered DIMMs cannot use this module.

240-Pin DIMM Installation

The stick inserts into a standard 240-pin DDR3 slot on the system board. No heat spreader means the module sits low, but adjacent components can still block access in dense chassis. Alignment notches prevent backward insertion, yet forcing the latch risks cracking the PCB. Systems that require matched pairs or specific population rules will not accept a single stick.

Sustained ECC Operation

ECC circuitry corrects single-bit errors continuously during long file transfers or RAID rebuilds. The 1.5V rating keeps power draw steady under constant load without thermal throttling. JEDEC CL11 timing maintains stability when the memory controller runs at full speed for hours. Workloads that exceed 4GB capacity will swap to disk, negating the speed advantage.