SK Hynix 48GB DDR5-5600 ECC Unbuffered DIMM — HMCGY8MGBEB252N

The SK Hynix HMCGY8MGBEB252N is a 48GB DDR5-5600 ECC Unbuffered DIMM operating at 1.1V. Built on SK Hynix's advanced DDR5 technology with 24Gb die, it delivers high-capacity ECC memory for workstations and servers requiring error correction without full buffering — ideal for AMD Ryzen Threadripper PRO and Intel Xeon W platforms supporting ECC UDIMM.

Key Features

• 48GB DDR5-5600 (PC5-44800) — high-capacity ECC UDIMM
• ECC (Error Correcting Code) — single-bit error detection and correction
• Unbuffered (UDIMM) — compatible with workstation and select server platforms
• 1.1V operating voltage — improved power efficiency over DDR4
• x8 organization, CL46 latency
• 288-pin DIMM interface
• 24Gb die — enables 48GB in a single DIMM

Product Specifications

• Part Number: HMCGY8MGBEB252N
• Manufacturer: SK Hynix
• OEM Status: OEM / Bulk
• Capacity: 48GB
• Speed: DDR5-5600 (PC5-44800)
• Type: ECC Unbuffered DIMM (ECC UDIMM)
• Form Factor: 288-Pin DIMM
• Voltage: 1.1V
• CAS Latency: CL46
• Organization: x8

Memory Specifications

• Capacity: 48GB
• DDR Generation: DDR5
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• ECC: Yes (ECC)
• Buffered: Unbuffered (UDIMM)
• Form Factor: 288-Pin DIMM
• Die Density: 24Gb

Performance Specifications

• Bandwidth: Up to 44,800 MB/s (PC5-44800)
• Operating Temperature: 0°C to 85°C
• Storage Temperature: -55°C to 100°C

Use Cases

• High-capacity ECC memory for AMD Ryzen Threadripper PRO workstations
• Intel Xeon W workstation platforms supporting ECC UDIMM
• Memory-intensive professional workloads requiring ECC protection
• 3D rendering, simulation, and data science workstation builds

Compatibility

• Platforms supporting DDR5 ECC Unbuffered DIMM (ECC UDIMM)
• AMD Ryzen Threadripper PRO 7000 WX series (verify QVL)
• Intel Xeon W-2400 / W-3400 series (verify QVL)
• Not compatible with DDR4 slots or RDIMM/LRDIMM slots

Frequently Asked Questions

What is the difference between ECC UDIMM and RDIMM?

ECC UDIMM provides error correction without a register/buffer chip, making it compatible with workstation platforms. RDIMM uses a register for signal buffering and is designed for server platforms. They are not interchangeable.

Why is this 48GB instead of the standard 32GB or 64GB?

The 48GB capacity uses 24Gb die technology, enabling a 3x16GB configuration per DIMM. This is a newer DDR5 capacity point enabled by higher-density NAND die.

Is this compatible with consumer Intel or AMD desktop platforms?

Most consumer desktop platforms do not support ECC UDIMM. This module is intended for workstation-class platforms that explicitly support ECC UDIMM — verify your motherboard's QVL before purchasing.

The SK Hynix HMCGY8MGBEB252N delivers 48GB of DDR5-5600 ECC Unbuffered memory — a high-capacity, error-correcting DIMM for professional workstations demanding both DDR5 bandwidth and ECC reliability.