OWC 64GB (4x16GB) DDR4 2666 ECC UDIMM Memory Upgrade for Synology RS2418+ & RS2418RP+

64GB DDR4 ECC kit for Synology RS2418 series

This 64GB kit contains four 16GB DDR4 2666 ECC UDIMM modules built for the Synology RackStation RS2418+ and RS2418RP+. The unbuffered 288-pin DIMMs run at 1.2V with CL19 latency and 2Rx8 organisation. It targets administrators who need the maximum supported memory for virtualization, heavy file serving or surveillance workloads on these specific NAS units.

Replaces lower-capacity or non-ECC factory memory

The modules step up from the standard installed DIMMs by adding error-correcting code and a full 64GB capacity across all four slots. The upgrade is worth it when the workload regularly hits the memory ceiling, triggers swapping or requires ECC protection for data integrity. The kit is backward compatible with 2133MHz and 2400MHz bus speeds, so it will clock down automatically if the system requires it. Buyers who need more than 64GB or registered DIMM support cannot use this kit.

Tool-free slot installation with slot-order care

Installation is a straightforward DIY task: power down the unit, open the chassis and press each module into the 288-pin slots until the latches click. The most common issue is populating the slots in the wrong order, which can prevent the NAS from recognising the full capacity. Follow the manufacturer’s slot-population guide for the RS2418+ and RS2418RP+ to avoid a no-post condition. No heat spreaders are fitted, so airflow clearance is not a concern.