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
Registered ECC DDR4 server memory, 16 GB at 2666 MHz, 1.2 V, 2Rx8, 288-pin, HPE 835955-K21 compatible
This 16GB DDR4-2666 module is built for servers and workstations that require registered ECC memory. It uses a 2Rx8 organisation and runs at 1.20V across 288 pins. The stick is validated as 100% compatible with HPE part number 835955-K21.
A single 16GB DIMM adds substantial capacity to multi-socket platforms running virtualisation, databases or dense container workloads. The DDR4-2666 speed delivers 21300 MB/s bandwidth per module. Registered buffering keeps signal integrity stable when many DIMMs populate a channel, though total system memory remains limited by the motherboard slot count and CPU memory controller.
This module replaces lower-capacity registered ECC sticks or non-ECC memory that cannot meet data-integrity requirements. The jump is worth it when workloads exceed current RAM headroom or when ECC protection becomes mandatory for error correction. It does not suit systems limited to unbuffered memory or those requiring higher frequencies than 2666 MT/s.
| Brand | HPE |
|---|---|
| Capacity | 16GB |
| Type | 288-Pin DDR4 SDRAM |
| Speed | DDR4 2666 (PC4 21300) |
| Voltage | 1.20V |
| ECC | Yes |
| Buffered/Registered | Registered |
| Rank | 2Rx8 |
| Chipset | Major Brand Chipset |
Yes — it is a standard 288-pin DDR4-2666 registered ECC DIMM that installs in any DDR4 server slot supporting registered memory.
Check the BIOS memory information or run a tool such as dmidecode; it should report 16 GB, DDR4-2666, 2Rx8 registered ECC at 1.20 V.
The package contains the 16 GB DDR4-2666 2Rx8 registered ECC DIMM only; no heatsink, cable or other accessories are supplied.
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