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 32 GB DDR5 registered ECC modules at 4800 MT/s CL40 1.1 V for ThinkMate Supermicro servers
This 256GB kit provides eight 32GB DDR5 4800 registered DIMMs with ECC and CL40 latency. It targets administrators expanding memory in Thinkmate Supermicro SuperServer 621P-TR, 621P-TRT and 221P-C9R platforms that require registered error-correcting modules. The 1.10V operating voltage matches the DDR5 baseline for these qualified systems.
Each 288-pin RDIMM presents a 1Rx4 organisation that the memory controller addresses as a single rank per module. The registered buffer reduces electrical load on the server’s memory bus, allowing all eight slots to be populated without additional buffering hardware. ECC circuitry corrects single-bit errors and detects multi-bit faults to protect data integrity in mission-critical workloads.
Modules are stress-tested under continuous load before shipment to verify reliable operation at the rated 4800 MT/s transfer rate. The absence of a heat spreader means airflow through the server chassis must meet the platform’s thermal design for the memory subsystem. Builders needing non-registered UDIMMs or capacities beyond 256GB should select a different kit.
| Brand | NEMIX RAM |
|---|---|
| Series | THINKMATE Server/Workstation Compatible Series Memory |
| Model | THINKMATE DDR5 4800MHZ ECC RDIMM Registered Server Memory |
| Part Number | MR38400-314K8 |
| Capacity | 256GB (8 x 32GB) |
| Speed | DDR5 4800 (PC5 38400) |
| ECC | Yes |
| Buffered/Registered | Registered |
| Chipset | Major OEM Samsung, Micron, Hynix |
| Voltage | 1.10V |
| Compatible System | THINKMATE |
| CAS Latency | CL40 |
| Heat Spreader | No |
| Type | 288-Pin DDR5 RDIMM |
| Rank | 1Rx4 |
| Features | DDR5 ECC Registered RDIMM Server Motherboard Compatible |
| Package Content | 256GB (8X32GB) DDR5 4800MHZ PC5-38400 1Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT |
The kit runs at CL40, meaning each module has a CAS latency of 40 cycles at the rated 4800 MT/s speed.
They operate at 1.1 V with no heat spreader, so thermal output is low but depends on your server's airflow and DIMM spacing.
The kit is validated for Thinkmate Supermicro SuperServer 621P-TR, 621P-TRT and 221P-C9R platforms.
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