SK hynix HMA42GR7AFR4N-TF 16GB DDR4 2133MHz CL15 ECC Registered Dual Rank 1.2V 288-Pin Server RAM
- 16GB
- 288-Pin DDR4 SDRAM
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NEMIX RAM
16GB DDR4 2666 ECC RDIMM module built for Synology FS3410 NAS expansion
This 16 GB DDR4 2666 MHz registered DIMM adds ECC-protected capacity to a Synology FlashStation FS3410 NAS. It operates at 1.2 V with CL19 latency and uses a 2Rx4 organisation on a 288-pin module. The stick is built with major OEM DRAM and validated for the target platform.
The module suits administrators expanding a compatible Synology NAS where registered ECC RDIMMs are required. It will not work in systems that accept only unbuffered non-ECC UDIMMs or that require a different DDR generation, speed or voltage. Builders needing higher densities per slot or lower latencies should look elsewhere.
One stick provides 16 GB of addressable memory with ECC overhead for data integrity under sustained workloads. The dual-rank x4 layout helps populate channels efficiently on supported boards. Headroom ends at the module's 16 GB limit; larger configurations require additional DIMM slots and matching modules.
| Brand | NEMIX RAM |
|---|---|
| Series | Synology Compatible Series NAS Memory |
| Model | Synology DDR4 2666MHZ ECC RDIMM Registered Server Memory |
| Part Number | MR21300-624K1 |
| Capacity | 16GB |
| Speed | DDR4 2666 (PC4 21300) |
| ECC | Yes |
| Buffered/Registered | Registered |
| Chipset | Major OEM Samsung, Micron, Hynix |
| Voltage | 1.20V |
| Compatible System | Synology |
| CAS Latency | CL19 |
| Heat Spreader | No |
| Type | 288-Pin DDR4 RDIMM |
| Rank | 2Rx4 |
| Features | DDR4 ECC Registered RDIMM Server Motherboard Compatible |
| Package Content | 16GB (1X16GB) DDR4 2666MHZ PC4-21300 2Rx4 1.2V CL19 288-PIN ECC RDIMM Registered Server Memory |
The module is validated for the FS3410; the NAS firmware will detect the 2666 MHz speed and CL19 timings automatically during POST.
The FS3410 memory slots accept only registered ECC RDIMMs, so mixing with unbuffered non‑ECC modules is not supported.
In DSM open Control Panel → Info Center → Memory; it will show 16 GB, 2666 MHz, ECC enabled and the MR21300‑624K1 part number.
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