Kingston KSM56R46BD8-32MD 32GB DDR5-5600 ECC Registered Server DIMM

The Kingston KSM56R46BD8-32MD is a 32GB DDR5 ECC Registered DIMM running at 5600 MT/s — a purpose-built server memory module designed for compute-dense environments where data integrity and sustained throughput both matter. If you're specifying memory for a rack-mount server, workstation, or edge AI appliance that calls for DDR5 RDIMM, this is the module to evaluate. It ships as a single 32GB stick in a 2Rx8 dual-rank configuration sourced with Micron D-die, and it operates at a CAS latency of 46 at 1.1V — standard DDR5 RDIMM territory for production server deployments.

Key Features

• DDR5-5600 MT/s Data Rate: At 5600 MT/s, this module delivers roughly 40% more raw memory bandwidth than DDR4-3200 — a meaningful advantage in multi-threaded server workloads like database query processing, video analytics inference, or real-time log aggregation where memory bandwidth is the actual bottleneck.
• 32GB Capacity in a Single DIMM: Packing 32GB per slot means you can reach high-density configurations without filling every DIMM slot, which preserves slots for future expansion. A 4-slot server reaches 128GB with all slots populated; an 8-slot system hits 256GB without needing 64GB modules at a price premium.
• ECC with On-Die ECC: This module carries both standard ECC (error-correcting code across the memory bus, handled by the memory controller) and On-Die ECC (error correction within the DRAM die itself, a DDR5 architectural requirement). The result is a two-layer error-correction stack — ODEC catches single-bit errors before they even reach the bus, while the system-level ECC handles anything that makes it through. For 24/7 server workloads, this matters: uncorrected bit errors in RAM are among the most insidious causes of silent data corruption.
• Registered (Buffered) Design: The register on an RDIMM re-drives the command and address signals, which reduces the electrical load on the CPU's memory controller. This is why RDIMMs are the standard choice for servers supporting more than two DIMMs per channel — signal integrity holds at higher slot counts where UDIMMs would fail.
• Dual-Rank (2Rx8) Organization: The 2Rx8 layout means the module presents two independent ranks to the controller, which allows rank interleaving and can improve effective throughput on memory-intensive workloads compared to a single-rank module at the same capacity. The 4096M x 80 module configuration (4096 million rows, 80-bit wide including ECC bits) reflects the underlying DRAM array structure.
• 1.1V Operating Voltage: DDR5's lower supply voltage (1.1V vs DDR4's 1.2V) directly translates to reduced per-module power draw. In a densely populated server with 8 or 16 DIMMs, that difference accumulates — useful for power-capped environments or high-density blade chassis.
• CAS Latency 46 (CL46): At DDR5-5600, CL46 works out to a true latency of approximately 16.4 ns (calculated as CL / transfer rate × 2000). This is competitive for server-class DDR5 at this speed grade — tighter than CL48 modules running the same frequency, which matters in latency-sensitive applications like in-memory databases or real-time analytics pipelines.
• SPD Profile Support: The module carries a programmed SPD (Serial Presence Detect) profile, which allows the host system's BIOS to automatically detect the correct operating parameters without manual timing configuration. This is standard on server RDIMMs and ensures plug-and-play compatibility with qualifying platforms.
• Micron D-Die Component: The