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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Brute Networks
8GB DDR4-2400 ECC SODIMM with CL15 latency and 1.20V operation for HP-compatible servers
This module is an 8GB DDR4-2400 ECC SODIMM designed for HP servers and workstations that require error-correcting memory. It operates at 1.20V with a CAS latency of CL15 and uses a 2Rx8 rank configuration. The part is built with major-brand DRAM chips and matches HP part number Y7B56AA.
It upgrades or replaces an existing DDR4-2400 ECC SODIMM in compatible HP platforms when additional capacity is needed. The jump is worth it when the system currently runs with fewer modules or lower density and the workload benefits from extra memory bandwidth. Systems already populated to the maximum supported capacity will not see further gains.
Installation consists of inserting the SODIMM into an available DDR4 SO-DIMM slot until the retention clips engage. The most common issue occurs when the module is not fully seated, causing the system to fail POST or report a memory error. Mixing this unbuffered ECC module with registered DIMMs will also prevent the server from booting.
| Brand | HP |
|---|---|
| Capacity | 8GB |
| Type | 288-Pin DDR4 SDRAM |
| Speed | DDR4 2400 (PC4 19200) |
| CAS Latency | CL15 |
| Voltage | 1.20V |
| ECC | Yes |
| Buffered/Registered | Unregistered |
| Rank | 2Rx8 |
| Chipset | Major Brand Chipset |
The module uses the 288-pin DDR4 SODIMM form factor, which matches the SO-DIMM slots on compatible HP platforms.
Align the notch with the slot key, insert at a slight angle, then press firmly until both side clips click — many forget to verify both clips are fully locked.
Replace it if the system logs correctable ECC errors that become uncorrectable, or if memory diagnostics report persistent faults after reseating.
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