Kingston 48GB DDR5-5600 ECC Unbuffered DIMM for Workstations and Servers

The Kingston KSM56E46BD8KM-48HM is a 48GB DDR5-5600 (PC5-44800) ECC Unbuffered DIMM with CL46 latency, 1.1V operation, and dual rank x8 organization — utilizing 24Gb DRAM dies to achieve 48GB density in a single UDIMM, providing a higher-capacity ECC DDR5 option for workstations and DDR5 UDIMM-compatible server platforms.

Key Features

• 48GB DDR5-5600 ECC UDIMM — highest density DDR5 UDIMM using 24Gb DRAM dies
• 50% more capacity per slot than 32GB DDR5 UDIMMs for maximum workstation memory density
• ECC for hardware error detection and correction in reliability-critical environments
• Unbuffered DIMM — compatible with DDR5 ECC UDIMM workstation and entry-server platforms
• 1.1V DDR5 low-voltage operation with DDR5 native on-die ECC

Product Specifications

• Part Number: KSM56E46BD8KM-48HM
• Manufacturer: Kingston
• Capacity: 48GB
• Type: DDR5 ECC UDIMM (Unbuffered)
• Speed: 5600MHz (PC5-44800)
• CAS Latency: CL46
• Voltage: 1.1V
• Pins: 288-pin

Memory Specifications

• Ranks x Width: 2Rx8 (Dual Rank x8)
• DRAM Die Density: 24Gb (enabling 48GB at 2Rx8)
• ECC: Yes (system-level ECC + DDR5 on-die ECC)
• Registered: No (UDIMM — unbuffered)
• JEDEC Compliant: DDR5-5600 JEDEC standard

Performance Specifications

• Peak Bandwidth: ~89.6 GB/s (dual-channel at 5600MHz)
• Capacity Advantage: 48GB vs 32GB per slot — 50% more capacity for the same slot count
• Timing: 46-45-45
• On-Die ECC: Yes (DDR5 native)

Use Cases

• Professional workstations requiring maximum DDR5 ECC UDIMM capacity per slot (96GB in dual-slot systems)
• AMD Ryzen PRO 7000 and Intel Xeon W workstations supporting 48GB DDR5 ECC UDIMMs
• Engineering simulation, 3D rendering, and large dataset processing requiring high per-slot capacity
• Entry-level DDR5 ECC servers with limited DIMM slots benefiting from 48GB density

Compatibility

• Compatible with platforms supporting DDR5 ECC Unbuffered DIMMs and 24Gb die density
• Works with AMD Ryzen PRO 7000 series and Intel Xeon W-2400/W-3400 supporting 48GB ECC UDIMMs
• Verify motherboard and BIOS support for 24Gb die DDR5 modules before ordering
• Not compatible with DDR5 RDIMM-only enterprise server platforms

Frequently Asked Questions

Why is this module 48GB instead of a standard power-of-two capacity like 32GB or 64GB?

The 48GB capacity results from using 24Gb DRAM dies in a 2Rx8 configuration (2 ranks × 8 chips × 24Gb = 384Gb = 48GB). DDR5 introduced 24Gb die density as a JEDEC-standard option, enabling 48GB and 96GB module capacities alongside traditional 32GB and 64GB sizes.

Does the KSM56E46BD8KM-48HM require BIOS updates to be recognized?

Some older BIOS versions may not recognize 24Gb die DDR5 modules. Kingston recommends updating to the latest BIOS before installing 48GB DDR5 UDIMMs to ensure proper detection and operation at DDR5-5600 speed.

What total system memory is achievable with KSM56E46BD8KM-48HM in a dual-DIMM workstation?

A workstation with two DIMM slots populated with KSM56E46BD8KM-48HM modules achieves 96GB total DDR5-5600 ECC system memory — 50% more than the 64GB achievable with two 32GB ECC UDIMM modules in the same platform.

The Kingston KSM56E46BD8KM-48HM redefines DDR5 workstation memory density — delivering 48GB of ECC DDR5-5600 per slot using 24Gb die technology, enabling workstations with limited DIMM slots to reach 96GB ECC configurations that previously required four-slot platforms or registered RDIMM servers.