Micron 64GB DDR4-3200 ECC LRDIMM 4Rx4 — MTA72ASS8G72LZ-3G2R2

The Micron MTA72ASS8G72LZ-3G2R2 is a 64GB DDR4-3200 ECC Load Reduced DIMM (LRDIMM) operating at 3200MHz (PC4-25600) with CL22 latency at 1.2V in Quad Rank x4 configuration. The R2 suffix identifies a specific production revision for Intel Xeon Scalable and AMD EPYC DDR4 server platforms requiring 64GB per slot via LRDIMM load reduction.

Key Features

• 64GB capacity via LRDIMM load reduction
• Load Reduced (LRDIMM) — data buffer for higher per-channel capacity
• Quad Rank x4 (4Rx4)
• R2 production revision
• DDR4-3200 — highest standard DDR4 server speed

Product Specifications

• Part Number: MTA72ASS8G72LZ-3G2R2
• Manufacturer: Micron
• Capacity: 64GB
• Type: DDR4 ECC LRDIMM
• Speed: 3200MHz (PC4-25600)
• CAS Latency: CL22
• Voltage: 1.2V
• Ranks x Width: 4Rx4
• Pins: 288-pin

Memory Specifications

• Bandwidth: PC4-25600 (25.6 GB/s theoretical)
• ECC: Single-bit error correction and multi-bit error detection
• RAS Features: ECC and load reduced data buffer
• Buffer Type: Load Reduced — data buffer between controller and DRAM ranks

Use Cases

• Intel Xeon Scalable (LGA3647) servers requiring 64GB DDR4-3200 LRDIMM per slot
• High-density virtualization requiring 64GB per slot via LRDIMM
• AMD EPYC servers requiring 64GB DDR4-3200 LRDIMM per slot
• Platforms where RDIMM cannot achieve 64GB per slot

Compatibility

• DDR4 LRDIMM slots on Intel Xeon Scalable (LGA3647) servers
• AMD EPYC (SP3) DDR4 server platforms supporting LRDIMM
• Not compatible with RDIMM-only or UDIMM-only platforms
• Verify server QVL — LRDIMM requires explicit platform support

Frequently Asked Questions

What is the difference between MTA72ASS8G72LZ-3G2R2 (64GB LRDIMM) and MTA36ASF8G72PZ-3G2E1 (64GB RDIMM)?

MTA72ASS8G72LZ-3G2R2 is a 64GB LRDIMM using load reduction while MTA36ASF8G72PZ-3G2E1 is a 64GB RDIMM. LRDIMM requires explicit platform support — verify your server QVL for the correct memory type.

What does 4Rx4 mean in an LRDIMM?

Quad Rank x4 — four ranks of x4 (4-bit wide) DRAM devices. The LRDIMM data buffer abstracts the rank loading from the memory controller enabling higher capacity per slot.

Can LRDIMM be mixed with RDIMM in the same server?

No — LRDIMM and RDIMM cannot be mixed in the same server. All populated DIMM slots must use the same memory type.

The Micron MTA72ASS8G72LZ-3G2R2 delivers 64GB DDR4-3200 ECC LRDIMM in 4Rx4 configuration — the R2 revision for Intel Xeon Scalable and AMD EPYC DDR4-3200 server platforms requiring 64GB per slot via LRDIMM.