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
Adds 16 GB of DDR5 ECC registered memory at 4800 MHz for compatible Supermicro servers
This 16 GB DDR5 module runs at 4800 MT/s with CL40 latency and 1.10 V operation. It uses a 1Rx8 registered design with on-die ECC for data integrity in multi-socket platforms. The 288-pin form factor fits Supermicro FatTwin and SuperServer systems listed in the compatibility data.
Registered buffering reduces electrical load on the memory controller during continuous throughput, helping stability in virtualisation and database tasks. ECC correction handles single-bit errors without halting the system. The 1.10 V baseline keeps power draw predictable across long deployments.
Verify that your Supermicro motherboard supports DDR5 RDIMM populations and the 1Rx8 rank configuration for the target slot count. Confirm the BIOS revision enables 4800 MT/s operation with registered modules. Ensure the chassis provides adequate airflow for modules without heat spreaders.
| Brand | NEMIX RAM |
|---|---|
| Series | SuperMicro Server/Workstation Compatible Series Memory |
| Model | SuperMicro DDR5 4800MHZ ECC RDIMM Registered Server Memory |
| Part Number | MR38400-618K1 |
| Capacity | 16GB |
| Speed | DDR5 4800 (PC5 38400) |
| ECC | Yes |
| Buffered/Registered | Registered |
| Chipset | Major OEM Samsung, Micron, Hynix |
| Voltage | 1.10V |
| Compatible System | Supermicro |
| CAS Latency | CL40 |
| Heat Spreader | No |
| Type | 288-Pin DDR5 RDIMM |
| Rank | 1Rx8 |
| Features | DDR5 ECC Registered RDIMM Server Motherboard Compatible |
| Package Content | 16GB (1X16GB) DDR5 4800MHZ PC5-38400 1Rx8 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory |
The module operates at 1.10 V, which is the standard DDR5 voltage, so power draw stays within the platform's normal memory budget during all-day operation.
You need a Supermicro motherboard with DDR5 RDIMM slots and a chipset that supports 4800 MT/s registered ECC memory, such as the X13SEFR-A used in FatTwin SYS-F511E2-RT and SYS-F521E3-RTB systems.
Mixing ranks or latencies can work if the motherboard qualifies the combination, but the safest path is to populate identical 1Rx8 CL40 modules per channel for guaranteed stability.
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