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
Eight 64 GB DDR5 4800 CL40 ECC registered DIMMs at 1.1 V for SuperMicro X13SEI-F and X13SEI-TF servers
This 512 GB kit contains eight 64 GB DDR5 registered DIMMs built for SuperMicro X13SEI-F and X13SEI-TF motherboards. The modules run at 4800 MT/s with a CAS latency of 40 and operate at 1.10 V. ECC and registered buffering provide the data integrity required by server workloads.
Registered buffering reduces electrical load on the memory controller, allowing all eight slots to stay populated without signal degradation during continuous operation. ECC corrects single-bit errors on the fly, preventing silent data corruption during long compute runs. The 1.10 V operating voltage keeps power draw steady under extended thermal stress.
The CL40 timing at 4800 MT/s is the single specification that determines whether this kit matches the motherboard's qualified vendor list. Systems validated for CL40 will train correctly; platforms requiring tighter latencies will not support these modules. Verify the QVL before purchase.
| Brand | NEMIX RAM |
|---|---|
| Series | SuperMicro Server/Workstation Compatible Series Memory |
| Model | SuperMicro DDR5 4800MHZ ECC RDIMM Registered Server Memory |
| Part Number | MR38400-924K8 |
| Capacity | 512GB (8 x 64GB) |
| 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 | 2Rx4 |
| Features | DDR5 ECC Registered RDIMM Server Motherboard Compatible |
| Package Content | 512GB (8X64GB) DDR5 4800MHZ PC5-38400 2Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT |
The kit operates at 1.10V, the standard DDR5 voltage, so sustained power draw and heat scale with the 512GB capacity and 4800 MT/s speed rather than any elevated voltage.
You need a SuperMicro X13SEI-F or X13SEI-TF motherboard with a CPU that supports DDR5-4800 registered ECC RDIMMs and enough DIMM slots for all eight modules.
The board will run every installed module at the slowest common speed and highest latency; mixing different DDR5 kits forces all slots to the lowest shared specification.
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