Micron 16GB 2666MHz DDR4 PC4-21300 ECC Registered CL19 288-Pin DIMM 1.2V Dual Rank x8 Memory Module – MTA18ASF2G72AZ-2G6E2ZI

Micron 16GB DDR4-2666 ECC RDIMM 2Rx8 — MTA18ASF2G72AZ-2G6E2ZI

The Micron MTA18ASF2G72AZ-2G6E2ZI is a 16GB DDR4-2666 ECC Registered DIMM (RDIMM) operating at 2666MHz (PC4-21300) with CL19 latency at 1.2V in Dual Rank x8 configuration. Despite sharing the MTA18ASF2G72AZ base part number the ZI suffix designates this as a registered RDIMM with industrial temperature qualification — not a UDIMM.

Key Features

• ECC Registered (RDIMM) — register buffer for enterprise server signal integrity
• ZI suffix — registered industrial temperature range variant
• Dual Rank x8 (2Rx8)
• Genuine Micron server memory

Product Specifications

• Part Number: MTA18ASF2G72AZ-2G6E2ZI
• Manufacturer: Micron
• Capacity: 16GB
• Type: DDR4 ECC RDIMM
• Speed: 2666MHz (PC4-21300)
• CAS Latency: CL19
• Voltage: 1.2V
• Ranks x Width: 2Rx8
• Pins: 288-pin
• Temperature Range: Industrial (ZI suffix)

Memory Specifications

• Bandwidth: PC4-21300 (21.3 GB/s theoretical)
• ECC: Single-bit error correction, multi-bit error detection
• RAS Features: ECC, registered buffer

Use Cases

• Enterprise servers requiring DDR4-2666 ECC RDIMM 2Rx8
• Industrial and telecom platforms requiring extended temperature RDIMM
• Embedded server and networking infrastructure requiring industrial-grade DRAM

Compatibility

• DDR4 RDIMM slots on Intel Xeon Scalable (LGA3647) and AMD EPYC DDR4 platforms
• Not compatible with UDIMM-only platforms
• Verify server QVL before installation

Frequently Asked Questions

Why does MTA18ASF2G72AZ-2G6E2ZI have RDIMM type despite the AZ base part typically indicating UDIMM?

The ZI suffix overrides the base part classification — this variant is a registered RDIMM with industrial temperature qualification. Always verify the full part number when selecting memory type.

What does the ZI suffix mean?

Z indicates registered (RDIMM) and I indicates industrial temperature range — qualified for extended operating temperatures beyond standard commercial range.

What is the difference between MTA18ASF2G72AZ-2G6E2ZI and MTA18ASF2G72AZ-2G6E2R?

MTA18ASF2G72AZ-2G6E2ZI is an ECC RDIMM with industrial temperature qualification. MTA18ASF2G72AZ-2G6E2R is an ECC UDIMM. They require different platform support.

The Micron MTA18ASF2G72AZ-2G6E2ZI delivers 16GB DDR4-2666 ECC registered server memory in 2Rx8 configuration with industrial temperature qualification — the ZI registered variant for enterprise servers and industrial platforms requiring DDR4-2666 RDIMM.