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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8GB DDR4 ECC UDIMM running at 2133 MHz with CL15 latency and 1.2 V operation
This module is an 8GB DDR4-2133 ECC unbuffered DIMM built for Lenovo servers and workstations. It uses major-brand chips from Samsung, SK Hynix or Micron and meets OEM specifications. IT managers maintaining existing Lenovo infrastructure will find it a direct replacement for part 4X70G88331.
The single specification that decides fit is the 288-pin DDR4-2133 (PC4-17000) interface with CL15 latency, 1.20V operation and 2Rx8 organisation. ECC is supported and the module is unregistered. Systems requiring registered DIMMs, a different speed grade or non-ECC memory cannot use this part.
Installation is a standard DIMM insertion into a 288-pin DDR4 slot; no tools or firmware updates are required. The most common issue is mixing this unbuffered ECC module with registered DIMMs or populating slots in an order the server’s memory controller does not support, which prevents the system from posting.
| Brand | Lenovo |
|---|---|
| Capacity | 8GB |
| Type | 288-Pin DDR4 SDRAM |
| Speed | DDR4 2133 (PC4 17000) |
| CAS Latency | CL15 |
| Voltage | 1.20V |
| ECC | Yes |
| Buffered/Registered | Unregistered |
| Rank | 2Rx8 |
| Chipset | Major Brand Chipset |
The module is rated for DDR4-2133 (PC4-17000) and will operate at that speed if the platform supports it; otherwise it downclocks to the highest speed the CPU and chipset allow.
Yes — it uses the standard 288-pin DDR4 UDIMM form factor, so it fits any desktop or server board with DDR4 UDIMM slots.
Standard UDIMM height applies; it requires a regular DDR4 DIMM slot with normal vertical clearance and no oversized heatsinks blocking adjacent slots.
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