OWC 4GB DDR3L 1866 CL13 1Rx8 204-pin 1.35V SODIMM memory upgrade

Single 4 GB DDR3L module for QNAP NAS

This SODIMM adds four gigabytes of DDR3L 1866 memory to compatible QNAP TS-253B, TS-253Be, TS-453B, TS-453Be and TS-453BT3 units. The 204-pin unbuffered module runs at 1.35 V with CL13 latency and meets JEDEC PC3L-14900 specifications. It is built for owners who need a straightforward capacity increase without ECC or registered buffering.

Low-voltage operation keeps thermals modest

At 1.35 V the module draws less power than standard DDR3, so heat output stays low inside the compact NAS chassis. No heat spreader is fitted, relying on the system’s existing airflow. The non-ECC, single-rank design avoids extra controller overhead, helping idle power remain minimal during typical file-serving workloads.

Steady throughput under sustained NAS workloads

Continuous read-write streams such as backup jobs or media indexing run at the rated 1866 MT/s without throttling. The single 4 GB rank means total capacity is limited to this module’s size, so users needing more memory must populate additional slots with matching modules. Systems requiring ECC error correction or registered DIMMs cannot use this part.