KSM56R46BD8PMI - 32GB DDR5-5600 ECC RDIMM 2Rx8 CL46 | Kingston
MPN: KSM56R46BD8PMI ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $189 | $189.00 |
| 10 | $178.5 | $1,785.00 |
| 100 | $165 | $16,500.00 |
| 500 | $152 | $76,000.00 |
| 1,000 | $142 | $142,000.00 |
KSM56R46BD8PMI Overview
A DDR5 RDIMM (Registered DIMM) is a type of server-grade synchronous DRAM module that uses an on-module register buffer between the memory controller and the DRAM chips. DDR5 (Double Data Rate 5) is the fifth generation of main-memory SDRAM, succeeding DDR4 with higher per-pin transfer rates, on-DIMM voltage regulation (PMIC), and improved channel efficiency through decision feedback equalization (DFE). Within the memory taxonomy: DDR5 SDRAM -> SDRAM -> volatile memory -> integrated circuit -> semiconductor. RDIMMs are critical for enterprise servers, workstations, and high-reliability compute platforms because the register buffer reduces electrical loading on the memory controller, enabling higher capacities and more DIMMs per channel.
Key features of the KSM56R46BD8PMI include a 5600 MT/s data rate (PC5-44800), a 4G x 80-bit logical organization (32GB capacity with ECC), CL46-45-45 timings at 1.1V, on-module PMIC for voltage regulation, and a 2Rx8 dual-rank configuration. The module is based on twenty 2G x 8-bit FBGA82 components. The SPD is programmed to JEDEC standard DDR5-5600 timing, and the module uses gold contact fingers for reliable high-cycle insertion in server DIMM sockets.
The KSM56R46BD8PMI uses Kingston's Server Premier validation process: each BOM revision is locked and qualified on major OEM server platforms (Dell PowerEdge, HPE ProLiant, Lenovo ThinkSystem, Supermicro). This contrasts with consumer UDIMMs which are not platform-validated. The on-DIMM PMIC handles the 1.1V regulation previously performed by the motherboard, improving power integrity under heavy load.
Typical applications include enterprise server memory upgrades, workstation memory for content creation, virtualization host memory pools, in-memory database deployments, and cloud compute infrastructure. The Kingston Server Premier line is engineered specifically for system integrators and data center operators who require validated, consistent memory.
When designing with KSM56R46BD8PMI, verify that the target server's memory controller and BIOS support DDR5-5600 at 2Rx8 and 32GB per-DIMM density. Mixing with 1Rx8 modules in the same channel may force downclocking. The 1.1V operating voltage is mandatory - the on-module PMIC handles regulation; do not bypass.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet summary. It is intended for engineers and procurement specialists specifying validated server memory for OEM deployments.
Drop-in alternatives for KSM56R46BD8PMI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
KSM56R46BD8PMI-32MDI
✅ Drop-In📋 Reference alternative (not in catalog)
KSM56R46BD8PMI-32HAI
✅ Drop-In📋 Reference alternative (not in catalog)
KSM56R46BD8PMI-48HMI
✅ Drop-In📋 Reference alternative (not in catalog)
KSM56R46BD4PMI-64HAI
✅ Drop-In📋 Reference alternative (not in catalog)
Atech-MEM-KSM56R46BD8PMI-32MDI
✅ Drop-In📋 Reference alternative (not in catalog)
NEMIX-KSM56R46BD8PMI-48MBI
✅ Drop-In📋 Reference alternative (not in catalog)
KSM56R46BD8PMI Maximum Ratings & Electrical Characteristics
| Memory Type | DDR5 SDRAM |
| Module Type | RDIMM (Registered DIMM) |
| Capacity | 32 GB |
| Data Rate | 5600 MT/s (PC5-44800) |
| CAS Latency | CL46 |
| Timing | 46-45-45 |
| Organization | 4G x 80-bit (2Rx8) |
| Rank Configuration | Dual Rank x8 (2Rx8) |
| ECC Support | Yes (ECC Registered) |
| Operating Voltage | 1.1 V |
| Form Factor | 288-pin DIMM |
| Component Package | FBGA82 (twenty 2G x 8-bit) |
| Contact Material | Gold contact fingers |
| SPD Programming | JEDEC standard DDR5-5600 |
| Product Family | Kingston Server Premier |
| RoHS Status | Compliant |
| Operating Temperature | 0C to +85C (server grade) |
KSM56R46BD8PMI Pin Configuration
| Pin 1 | DQ0_A — Data lane A bit 0 (DDR5 standard pinout) |
| Pin 72 | GND — Ground reference (DDR5 RDIMM edge-lock midpoint) |
| Pin 144 | VSS — Ground end of first edge lock |
| Pin 145 | DQ0_B — Data lane B bit 0 (second edge lock) |
| Pin 216 | GND — Ground reference (second edge-lock midpoint) |
| Pin 288 | VSS — Ground end of second edge lock |
Typical Applications
KSM56R46BD8PMI is suitable for 8 applications: Enterprise Server Memory Upgrade, AMD Threadripper Workstation Build, Virtualization Host Memory Pool, In-Memory Database Deployment, Cloud Compute Infrastructure, AI Inference Server Memory, Content Creation Workstation, Database Server Memory Expansion.
Enterprise Server Memory Upgrade
The KSM56R46BD8PMI is purpose-built for enterprise server memory upgrades in Dell PowerEdge Gen16/17, HPE ProLiant Gen11, and Lenovo ThinkSystem V3 platforms. With 32GB capacity at 5600 MT/s and 2Rx8 organization, it provides the highest density per DIMM slot supported by current server CPUs while leaving channel headroom. The 1.1V JEDEC standard operation aligns with server power budgets, and the on-DIMM PMIC handles voltage regulation cleanly under sustained load. Kingston's Server Premier validation guarantees BOM consistency across purchase orders - critical for hyperscale operators and OEM warranty compliance.
Recommended
AMD Threadripper Workstation Build
The KSM56R46BD8PMI-32HAI is validated for AMD Threadripper 7000 and 9000 series workstation platforms per PB Tech's compatibility list. Threadripper's quad-channel memory controller benefits from the 2Rx8 RDIMM's register buffer, which reduces loading and enables full 5600 MT/s operation. For content creation, 3D rendering, and compile workloads, the 32GB per-DIMM capacity allows 256GB total memory in an 8-DIMM Threadripper board, supporting large working sets. The CL46 timing balances bandwidth and latency well for workstation throughput benchmarks.
Recommended
Virtualization Host Memory Pool
Virtualization hosts running VMware vSphere, Microsoft Hyper-V, or KVM benefit from the KSM56R46BD8PMI's ECC Registered architecture. The 32GB capacity per DIMM enables large VM density (8x32GB = 256GB per host), while ECC corrects single-bit errors that would otherwise corrupt VM memory. The 2Rx8 organization provides better interleaving than 1Rx8 for memory-intensive workloads. Kingston Server Premier validation ensures reliable operation across the 24/7 duty cycle typical of virtualized infrastructure, reducing the risk of memory-induced VM crashes.
Recommended
In-Memory Database Deployment
In-memory databases such as SAP HANA, Redis Enterprise, and Memcached benefit from the KSM56R46BD8PMI's high capacity (32GB per DIMM) and 5600 MT/s bandwidth (PC5-44800 = 44.8 GB/s per module). Database workloads stress memory bandwidth and latency simultaneously - the CL46 timing represents a balanced compromise for transaction processing. The ECC Registered architecture is mandatory for HANA-class deployments. Populating 8 channels with 32GB RDIMMs yields 256GB capacity, sufficient for small-to-medium HANA nodes or large Redis cache pools.
Recommended
Cloud Compute Infrastructure
Cloud compute providers deploying standardized memory configurations for IaaS and bare-metal offerings benefit from the KSM56R46BD8PMI's locked BOM and JEDEC compliance. Kingston's Server Premier line guarantees identical DRAM components and SPD programming across procurement batches, eliminating the variability that causes cloud-scale compatibility issues. The 1.1V operation aligns with hyperscale energy efficiency targets. With 5600 MT/s bandwidth per module, compute instances can achieve predictable memory throughput across the entire fleet.
Recommended
AI Inference Server Memory
AI inference servers running models like Llama, Stable Diffusion, or Whisper benefit from the KSM56R46BD8PMI's high-density RDIMM architecture. Inference workloads are memory-bandwidth bound when loading model weights into GPU/CPU memory - the 5600 MT/s data rate provides the bandwidth headroom needed for parallel data movement. The 32GB capacity per DIMM enables 256GB+ system memory configurations that accommodate large context windows. ECC Registered operation is essential for inference accuracy, preventing silent memory errors that produce wrong outputs.
Recommended
Content Creation Workstation
Content creation workstations running Adobe Premiere Pro, DaVinci Resolve, and Blender benefit from the KSM56R46BD8PMI's high-capacity RDIMM memory. Video editing at 8K resolution and complex 3D scenes with millions of polygons demand large system memory - 32GB per DIMM allows 128GB+ configurations in mainstream workstation boards. The 5600 MT/s bandwidth ensures smooth scrubbing through timeline caches, while CL46 latency keeps proxy generation responsive. Kingston's Server Premier validation provides reliability assurance for high-value creative work.
Recommended
Database Server Memory Expansion
Database servers running PostgreSQL, MySQL, or Microsoft SQL Server benefit from KSM56R46BD8PMI's 32GB capacity for buffer pool expansion. Database performance scales directly with buffer pool size - larger pools reduce disk I/O for hot data. The 5600 MT/s data rate supports high transaction throughput, while ECC ensures data integrity for financial and customer records. The 2Rx8 rank organization provides better memory interleaving than single-rank modules under concurrent query load, reducing query latency variance.
Recommended
Recommended Products Summary
Engineering reference data for KSM56R46BD8PMI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | KSM56R46BD8PMI-32MDI | KSM56R46BD8PMI-48HMI | Atech-MEM-KSM56R46BD8PMI-32MDI | NEMIX-KSM56R46BD8PMI-48MBI |
|---|---|---|---|---|---|
| Brand | Kingston Technology | Kingston Technology | Kingston Technology | Atech Memory | NEMIX RAM |
| Package | 288-pin DIMM (RDIMM) | 288-pin DIMM (RDIMM) - same | 288-pin DIMM (RDIMM) - same | 288-pin DIMM (RDIMM) - same | 288-pin DIMM (RDIMM) - same |
| Capacity | 32 GB | 32 GB | 48 GB (+50%) | 32 GB | 48 GB (+50%) |
| Data Rate | 5600 MT/s (PC5-44800) | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s |
| Rank Organization | 2Rx8 | 2Rx8 | 2Rx8 | 2Rx8 | 2Rx8 |
| CAS Latency | CL46 | CL46 | CL46 | CL46 | CL46 |
| Operating Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| ECC Support | Yes (Registered) | Yes (Registered) | Yes (Registered) | Yes (Registered) | Yes (Registered) |
| BOM Lock / OEM Validation | Kingston Server Premier (locked) | Kingston Server Premier (locked) | Kingston Server Premier (locked) | Third-party tested (not BOM-locked) | Third-party tested (not BOM-locked) |
Key Differentiators
- Kingston Server Premier BOM lock guarantees identical components across procurement batches (vs Third-party equivalents from Atech Memory and NEMIX RAM)
- Validated across major OEM server platforms (Dell, HPE, Lenovo, Supermicro) (vs Generic DDR5-5600 RDIMMs without platform validation)
- 2Rx8 rank organization provides better interleaving than 1Rx8 equivalents (vs 1Rx8 32GB DDR5-5600 RDIMMs from competitors)
Design Notes
Estimated: When mixing KSM56R46BD8PMI 32GB modules with smaller-density 16GB DDR5-5600 RDIMMs in the same channel, the memory controller will operate both at the speed of the slowest module. If mixing with 1Rx8 modules, the system may force 2Rx1 emulation which reduces effective bandwidth. Always populate all channels with identical MPNs for optimal interleaving and bandwidth. The 2Rx8 organization provides 2x the rank interleaving of 1Rx8 modules - do not mix rank counts within a channel.
The KSM56R46BD8PMI uses the standard 288-pin DDR5 RDIMM keying - this is NOT compatible with 288-pin DDR5 UDIMM slots. Inserting into a UDIMM socket will not seat properly and may damage the module or socket. The RDIMM key is positioned differently to prevent misinsertion. Server-class motherboards provide RDIMM slots; consumer motherboards provide UDIMM slots. The presence of a register buffer (visible as a larger central IC) is the physical indicator of RDIMM versus UDIMM.
The KSM56R46BD8PMI operates at 1.1V with on-module PMIC, which generates heat proportional to current consumption. Estimated: at full 5600 MT/s bandwidth utilization, a single module can draw 5-8W. In densely populated servers (8+ DIMMs per channel at 1DPC), system airflow must maintain inlet temperature below 35C for reliable operation. The Kingston Server Premier validated modules are tested at higher thermal thresholds than standard DRAM, but server airflow design should still follow ASHRAE A1/A2 guidelines.
Each KSM56R46BD8PMI module includes an on-DIMM PMIC (Lattice or Renesas, depending on BOM revision) that converts the host 12V supply to 1.1V locally. This is a fundamental DDR5 architectural shift from DDR4, where voltage regulation was motherboard-side. Do not attempt to bypass the PMIC or supply external 1.1V. The PMIC handles load-transient response and voltage positioning that the motherboard VR cannot deliver at the DIMM level. Adding series resistance in the 12V supply will cause PMIC undervoltage lockout.
Compliance Information
RoHS and REACH compliant per Kingston product page. Lead-free assembly. Halogen-free status not explicitly stated in verified sources - set to unknown. AEC-Q100 not applicable for DRAM modules. JEDEC JESD308 DDR5 compliance.
