Kingston KSM56R46BD8-32HA 32GB 5600MT/S DDR5 ECC Reg CL46 DIMM 2RX8 Hynix

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

Overview

The Kingston KSM56R46BD8-32HA is a 32GB DDR5 ECC Registered (RDIMM) module running at 5600MT/s — the right memory choice for rack-mounted servers and workstations that demand validated, error-corrected throughput at DDR5 speeds. Built on a 2Rx8 configuration with Hynix A-die ICs and a 288-pin DIMM form factor, this module targets platforms where memory reliability directly affects uptime, not just benchmark scores. If you're speccing memory for a surveillance NVR server, edge AI appliance, or enterprise workstation handling continuous high-throughput workloads, the KSM56R46BD8-32HA (often searched as KSM56R46BD8 32HA) is purpose-built for that environment.

Key Features

• DDR5-5600 at 5600MT/s: DDR5 at this transfer rate delivers roughly double the theoretical bandwidth of DDR4-3200 — meaningful when the server is processing simultaneous video streams, running analytics, or managing large in-memory datasets. The performance headroom translates directly to lower latency under sustained load.
• 32GB Capacity in a Single Module: A single 1x32GB DIMM means you can populate a 2-slot server to 64GB or scale up to 128GB+ in a 4-slot system without buying additional modules upfront. Dense, predictable memory expansion with minimal DIMM slots consumed.
• ECC (Error-Correcting Code) Support: ECC detects and corrects single-bit memory errors in real time, preventing silent data corruption that bare non-ECC memory can't catch. For servers running 24/7 — whether NVR appliances, edge compute nodes, or database workloads — ECC is the difference between a correctable event and a system crash or data loss.
• On-Die ECC (ODECC): Beyond the system-level ECC, this module includes On-Die ECC baked into the DDR5 silicon itself. ODECC handles error correction at the DRAM die level before data even reaches the memory controller — an additional reliability layer that matters in long-running server deployments where cumulative bit-error exposure is non-trivial.
• Registered (Buffered) Architecture: The registered/buffered design offloads the electrical load on the memory controller by placing a register between the controller and the DRAM ICs. This allows higher DIMM counts per channel and improves signal integrity at 5600MT/s speeds — critical for multi-DIMM server configurations where unregistered (UDIMM) modules would degrade or become unstable.
• CAS Latency 46 (CL46): At 5600MT/s with CL46, the absolute latency is approximately 16.4ns — competitive for DDR5 RDIMM at this speed bin. For server workloads, bandwidth matters far more than raw CAS latency, and this module delivers on both axes.
• 2Rx8 Dual-Rank Configuration: The dual-rank layout means the memory controller can interleave between ranks, improving effective bandwidth and reducing idle time. This directly benefits workloads with mixed read/write access patterns, such as database transactions or video buffer management.
• 1.1V Operating Voltage: DDR5's native 1.1V supply (down from DDR4's 1.2V) reduces power draw per module — relevant in dense server builds where memory power contributes meaningfully to thermal and PSU budgeting.
• SPD Profile Support: Factory-programmed SPD data ensures the module is auto-detected at its rated 5600MT/s speed on compatible platforms without manual BIOS tuning. Plug in, boot, and the system negotiates correct timings automatically.
• 288-Pin DIMM Form Factor: Standard DDR5 288-pin slot compatibility — fits Intel Xeon Scalable (Sapphire Rapids and later), AMD EPYC (Genoa/Bergamo), and DDR5-capable workstation platforms. Verify your platform's RDIMM support before ordering.

Integration & Compatibility

The KSM56R46BD8-32HA is designed for servers and workstations with DDR5 RDIMM support. Key compatibility considerations: DDR5 RDIMMs are not backward-compatible with DDR4 slots, and not all DDR5 platforms support registered modules — consumer platforms (Intel Core, AMD Ryzen) typically require UDIMMs. Confirm your motherboard's QVL (Qualified Vendor List) lists this module or explicitly supports 5600MT/s RDIMMs before procurement. Kingston provides a platform compatibility checker and publishes QVL-matched configurations for major server OEMs. The 4096M x 80 module configuration (72-bit wide with ECC) is standard for DDR5 RDIMM and compatible with Intel's IMC (Integrated Memory Controller) on Xeon Scalable generation 5 and AMD EPYC Gen 4 platforms. Mixed DIMM speed populations will downclock to the slowest installed module — if maximizing 5600MT/s throughput matters, populate all channels with matched-speed modules.

Frequently Asked Questions

Q: What server platforms is the KSM56R46BD8-32HA compatible with?

A: This module is a DDR5 RDIMM designed for server and workstation platforms with DDR5 registered memory support, including Intel Xeon Scalable (5th Gen, Sapphire Rapids) and AMD EPYC Gen 4 (Genoa) based systems. It is not compatible with consumer platforms (Intel Core, AMD Ryzen) or DDR4 slots. Always verify against your motherboard's QVL.

Q: Does the KSM56R46BD8-32HA support ECC?

A: Yes — this module supports both system-level ECC (which the memory controller uses to detect and correct single-bit errors) and On-Die ECC, which is built into the DDR5 DRAM silicon itself. ODECC provides an additional layer of error correction at the die level before data reaches the memory controller.

Q: What is the operating voltage of this module?

A: The KSM56R46BD8-32HA operates at 1.1V, which is the standard DDR5 supply voltage. This is lower than DDR4's 1.2V, contributing to slightly reduced per-module power consumption in dense server configurations.

Q: Can I mix this module with DDR5 UDIMMs or DDR4 modules in the same system?

A: No. DDR5 RDIMMs cannot be mixed with DDR4 modules (incompatible slot and electrical standard) and should not be mixed with UDIMMs on the same channel. For optimal stability and performance, populate channels with matched modules of the same type, speed, and rank configuration.

Q: What does the '2Rx8' designation mean for this module?

A: 2Rx8 indicates a dual-rank module using x8 (8-bit wide) DRAM ICs. Dual-rank allows the memory controller to interleave between ranks, improving effective bandwidth under mixed workloads. This configuration is well-suited for server applications with sustained read/write patterns.

Q: Is an SPD profile programmed at the factory?

A: Yes. The module ships with a factory-programmed SPD profile, so compatible platforms will automatically detect and configure the memory at its rated 5600MT/s speed and CL46 timings without requiring manual BIOS intervention.

Jerry Tildsen

When I spec memory for a server running continuous surveillance workloads or edge AI inference, the two non-negotiables are ECC and a validated speed bin. The KSM56R46BD8-32HA checks both: DDR5 at 5600MT/s with CL46 timings, ECC at the system level, and On-Die ECC baked into the Hynix A-die silicon — that dual-layer error correction architecture is what separates purpose-built server memory from modules that happen to fit the slot.

Technical Highlights:

• 5600MT/s Transfer Rate: At 5600MT/s, this module delivers approximately double the peak bandwidth of DDR4-3200 — directly beneficial when a server is managing simultaneous 4K video ingest, motion analytics, and database writes without queuing delays.
• On-Die ECC + System ECC: Two independent error-correction layers mean a single-bit fault gets caught at the die before it can propagate, and again at the controller if something slips through. For 24/7 NVR or analytics server deployments, this substantially reduces the risk of silent data corruption over long operational periods.
• Registered (Buffered) Architecture at 1.1V: The register between controller and DRAMs is what makes multi-DIMM server configurations stable at 5600MT/s. Without it, signal integrity degrades fast. At 1.1V, you're also running cooler than DDR4, which matters in thermally constrained 1U and 2U chassis.

Deployment Considerations:

• Verify your target platform's QVL explicitly supports 5600MT/s RDIMMs — some early DDR5 server boards top out at 4800MT/s or 5200MT/s, which will downclock this module and leave bandwidth on the table.
• The 2Rx8 dual-rank layout is optimal for interleaved workloads but double-check your platform's rank population rules: some platforms limit 2Rx8 DIMMs per channel at maximum capacity configurations, or require matched-rank population across both slots for full-speed operation.

This module is a well-matched fit for DDR5 Xeon Scalable or EPYC Gen 4 platforms running 24/7 NVR server, edge inference, or compute-dense workloads where the combination of 5600MT/s bandwidth and dual-layer ECC protection justifies the investment over unregistered DDR5.