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
64GB kit of four 16GB DDR5 4800 CL40 ECC registered DIMMs for Supermicro SuperWorkstation SYS-751A-I
This 64GB kit contains four 16GB DDR5 4800 CL40 ECC RDIMM modules built for the SuperMicro SuperWorkstation SYS-751A-I. Registered buffering and on-die ECC protect data integrity in multi-threaded server workloads. The 1.10V operating voltage matches the platform specification. IT teams handling virtualisation or database tasks gain validated capacity without guesswork.
Replacing smaller registered DIMMs with this 4x16GB set raises total memory to 64GB while keeping the same DDR5 4800 speed and CL40 timing. The jump is worth it when workloads exceed the current footprint and cause swapping or VM limits. Systems already running 4800 CL40 registered modules can add this kit without mixing speeds. Buyers needing higher frequency or lower latency must select a different validated part.
Modules seat in the 288-pin DDR5 slots with a vertical press until the ejectors click; no screws or cables are involved. The SuperWorkstation manual shows the required population order for quad-channel operation. Common issues include seating a module off-centre, which prevents the ejector from latching, or populating slots in the wrong sequence, which forces the system to run in reduced-channel mode. Always power down and observe anti-static precautions before starting.
| Brand | NEMIX RAM |
|---|---|
| Series | SuperMicro Server/Workstation Compatible Series Memory |
| Model | SuperMicro DDR5 4800MHZ ECC RDIMM Registered Server Memory |
| Part Number | MR38400-618K4 |
| Capacity | 64GB (4 x 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 | 64GB (4X16GB) DDR5 4800MHZ PC5-38400 1Rx8 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT |
Yes, the kit is built specifically for the SuperMicro SuperWorkstation SYS-751A-I and the Super X13DAI-T motherboard, so the 288-pin DDR5 RDIMM form factor matches the board's slots exactly.
Install all four modules in the slots designated for the same memory channel, then press down firmly until the ejector clips click; the step often missed is verifying that both clips lock on every module.
Replace them if the system logs uncorrectable ECC errors or if diagnostic software reports persistent failures; otherwise they are rated for continuous operation at the specified voltage and speed.
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