Kingston KSM32RD8/32HAR 32GB DDR4-3200 PC4-25600 2Rx8 CL22 ECC Registered RDIMM Server MemoryItem Introduction
Upgrade or expand a compatible enterprise server or professional workstation with the Kingston Server Premier KSM32RD8/32HAR 32GB DDR4-3200 ECC Registered DIMM (RDIMM).
The KSM32RD8/32HAR is a server-class memory module providing 32GB of DDR4 SDRAM on a single 288-pin DIMM. Kingston designed this module for systems requiring ECC Registered memory, combining DDR4-3200 performance, dual-rank 2Rx8 organization, ECC error correction, registered architecture, and JEDEC-standard operation.
Kingston specifies the module as a 4G x 72-bit (32GB) DDR4-3200 ECC Registered DIMM constructed from eighteen 2G x8-bit FBGA DRAM components. The module uses SK hynix A-die 16Gbit DRAM together with a Rambus Register Clock Driver (RCD).
The module's SPD is programmed for JEDEC-standard DDR4-3200 operation with 22-22-22 timings at 1.2V, providing standards-based enterprise operation rather than relying on an overclocked or XMP memory profile.
Its 2Rx8 architecture indicates that the module is dual rank and uses x8-organized DRAM devices. This distinction is important when matching existing server memory because modules with the same capacity and speed can still differ in rank, DRAM density, and device organization.
As an ECC Registered DIMM, the KSM32RD8/32HAR is designed for compatible server and workstation platforms rather than ordinary consumer desktop systems. ECC provides additional data-integrity protection, while the registered architecture reduces electrical loading on the system's memory controller to facilitate the larger DIMM populations commonly found in enterprise servers.
At its rated DDR4-3200 speed, the module provides an effective transfer rate of 3200 MT/s and belongs to the PC4-25600 bandwidth class. Kingston's exact JEDEC designation for this module is:
32GB 2Rx8 PC4-3200AA-RE4-13
The KSM32RD8/32HAR is part of Kingston's Server Premier memory family. It is particularly well suited for server upgrades, replacement of an identical module, virtualization hosts, databases, storage infrastructure, cloud computing, scientific applications, professional workstations, and other workloads requiring reliable ECC-protected system memory.
Item Features32GB Capacity
Provides:
32GB of DDR4 SDRAM on a single module
This capacity is well suited to enterprise platforms where multiple DIMMs can be combined to create high-capacity memory configurations.
Typical applications include:
Virtualization hosts
Database servers
Enterprise applications
Storage systems
Cloud computing
Engineering applications
Data workstations
Homelab servers
DDR4-3200 / 3200 MT/s
The KSM32RD8/32HAR is rated for:
DDR4-3200
with a maximum specified effective data-transfer rate of:
3200 MT/s
The module may commonly be advertised as "3200MHz" memory, although 3200 MT/s is the technically correct description of its effective DDR data rate.
Actual operating speed is determined by the installed processor, motherboard/server platform, BIOS/firmware, memory-channel configuration, and DIMM population.
PC4-25600 Bandwidth Class
DDR4-3200 corresponds to the commonly used:
PC4-25600
bandwidth classification.
This represents approximately 25.6 GB/s of theoretical transfer bandwidth per 64-bit memory channel.
Kingston's more specific JEDEC designation for this exact module is:
PC4-3200AA-RE4-13
CL22 JEDEC Timing
Kingston specifies a CAS latency of:
CL22
The module's SPD is programmed for JEDEC-standard DDR4-3200 primary timing is standard server-memory operation and does not require an enthusiast XMP overclocking profile.
ECC Error Correction
The KSM32RD8/32HAR supports:
ECC – Error-Correcting Code
ECC memory provides additional memory bits that allow a compatible server or workstation memory controller to detect and correct certain types of memory errors.
This functionality is especially valuable in systems where reliability and data integrity are important, hosts
Storage systems
Scientific computing
Enterprise computational workloads
ECC functionality requires support from the processor and motherboard/server platform.
Registered DIMM / RDIMM
This is a true:
Registered DIMM (RDIMM)
The module incorporates registered command/address signaling, reducing the electrical loading presented to the processor's memory controller.
This architecture is commonly used in enterprise servers because it enables supported platforms to operate with larger memory capacities and more heavily populated memory channels.
This module should not be confused with a standard desktop DDR4 UDIMM.
Registered with Parity
Kingston's official datasheet describes the KSM32RD8/32HAR as:
Registered with parity
The module also supports Command/Address Parity mode, an enterprise memory feature that provides additional signaling-integrity protection for command and address operations.
Dual-Rank 2Rx8 Organization
The exact KSM32RD8/32HAR configuration is:
2Rx8
This means:
This specification should not be confused with 2Rx4 server memory.
Rank and device organization can matter when matching an existing server configuration or following a manufacturer's DIMM population requirements.
16Gbit SK hynix A-Die DRAM
Kingston specifies this exact /32HAR revision as using:
SK hynix A-die DRAM
The module is constructed from:
18 × 2G x8-bit FBGA DRAM components
Each DRAM component has a density of:
16Gbit
The resulting module organization is:
4G x 72-bit
providing 32GB of usable capacity plus the additional data width required for ECC operation.
Rambus Register Clock Driver
Kingston identifies the register clock driver used on this exact revision as:
Rambus
The RCD is an important component of an RDIMM, managing registered command/address and clock signaling between the memory controller and the DRAM devices.
1.2V DDR4 Operation
The module operates at the standard DDR4 nominal supply voltage of:
1.2V
Kingston specifies:
VDD: 1.2V
VDDQ: 1.2V
VPP: 2.5V
VDDSPD: 2.41V to 2.75V
288-Pin DDR4 DIMM
The KSM32RD8/32HAR uses the standard:
288-pin DDR4 DIMM
physical form factor.
Gold-plated contact fingers are used for reliable electrical connectivity with the motherboard's DIMM socket.
Although standard DDR4 UDIMMs also use a 288-pin format, the electrical architecture is different. A 288-pin slot alone does not guarantee compatibility with this RDIMM.
16 Internal Banks
Kingston specifies:
16 internal memory banks
with DDR4 bank grouping.
The module supports CAS-to-CAS latency behavior for accesses involving banks within the same or different bank groups.
8-Bit Prefetch
Supports the DDR4 standard:
8-bit prefetch architecture
for efficient transfer of data between the internal DRAM core and external memory interface.
Burst Length Support
Supports:
On-Die Termination
Supports:
ODT – On-Die Termination
ODT helps maintain signal integrity by incorporating termination functionality within the DRAM architecture rather than relying entirely on external termination components.
Integrated Temperature Sensor
Kingston specifies:
Temperature sensor with integrated SPD
This allows compatible enterprise platforms to access DIMM information and monitor supported thermal data.
Write CRC
The module supports:
Write CRC
at all supported speed grades.
CRC functionality provides an additional mechanism for detecting errors occurring during write-data transfers.
Per-DRAM Addressability
Supports:
Per DRAM Addressability
allowing compatible systems to address individual DRAM devices for supported configuration and management operations.
Internal Vref DQ Generation
The module supports internal:
Vref DQ level generation
as part of its DDR4 signaling architecture.
Multiple Supported DDR4 Data Rates
Although rated for DDR4-3200, Kingston's datasheet lists support for multiple standardized DDR4 transfer allows the module to operate at lower supported speeds when required by an otherwise compatible system.
RoHS Compliant
Kingston specifies the module as compliant with the:
RoHS Directive
for restriction of specified hazardous substances.
Item SpecificationsGeneral TechnologyProduct FamilyKingston Server PremierManufacturer Part NumberKSM32RD8/32HARProduct TypeServer / Workstation MemoryMemory TechnologyDDR4 SDRAMCapacity32GBCapacity per Module32GBModule Quantity1Module TypeRegistered DIMM / with ParityForm FactorFull-Size DIMMPin Count288-PinPerformance SpecificationsSpecificationDetailsRated SpeedDDR4-3200Effective Data Rate3200 MT/sCommon Marketing Speed3200MHzPC RatingPC4-25600JEDEC DesignationPC4-3200AA-RE4-13CAS LatencyCL22Primary JEDEC Timing22-22-22Nominal Voltage1.2VMemory OrganizationSpecificationDetailsModule Organization4G x 72-bitRank Configuration2Rx8Number of Ranks2 / Dual RankDRAM Device Widthx8DRAM Component Count18DRAM Component Organization2G x8-bitDRAM Density16GbitInternal Banks16ECCYesComponent InformationSpecificationDetailsDRAM ManufacturerSK hynixDRAM Die RevisionHynix A-DieDRAM Density16GbitRegister Clock DriverRambusSPDIntegratedTemperature SensorIntegrated with SPDElectrical – 2.75VTiming SpecificationsSpecificationDetailsCAS Latency22 CyclesPrimary Timing22-22-22Minimum Row Cycle Time (tRCmin)45.75nsMinimum Refresh-to-Active/Refresh Command Time (tRFCmin)350nsMinimum Row Active Time (tRASmin)32nsEnvironmental Temperature0°C to +85°CStorage Temperature-55°C to +100°CUL Rating94 V-0RoHS CompliantYesAdditional DDR4 FeaturesFeatureSupportECC Error Correction / DetectionYesCommand/Address ParityYesWrite CRCYesOn-Die TerminationYesPer-DRAM AddressabilityYesInternal Vref DQ GenerationYesTemperature SensorYes8-Bit PrefetchYesBL8 / BC4 Burst SupportYesBank GroupingYesGold Contact FingersYesImportant Compatibility InformationThis Is DDR4 ECC Registered Memory
The Kingston KSM32RD8/32HAR is a:
DDR4 ECC Registered DIMM (RDIMM)
It is not a standard consumer DDR4 UDIMM.
Before purchasing, verify that the intended system supports:
Important 16Gbit DRAM Compatibility Requirement
This particular specification is especially important for the KSM32RD8/32HAR.
The module is constructed using 16Gbit-density DRAM components.
Kingston specifically notes that Intel limits support for 16Gbit-based memory modules to newer processor/system generations. Kingston's end-of-life documentation identifies Cascade Lake-SP (Xeon x2xx) and newer series processors as the applicable Intel generation for these 16Gbit-based modules.
Therefore, do not assume compatibility merely because an older server modules
The platform must also support the module's 16Gbit DRAM density.
Always verify compatibility for the exact server, motherboard, and processor generation.
RDIMM vs. UDIMM
RDIMM and UDIMM memory are electrically different.
This module should not be installed in a conventional desktop platform that supports only standard DDR4 UDIMMs.
Even though both module types use 288-pin DDR4 form factors, they are not interchangeable.
RDIMM vs. LRDIMM
This module is:
RDIMM – Registered DIMM
It is not:
LRDIMM – Load-Reduced DIMM
Many enterprise servers support one or both technologies, but RDIMMs and LRDIMMs generally cannot be mixed within the same memory configuration.
Follow the server manufacturer's memory population rules.
Memory Speed
DDR4-3200 represents the module's rated maximum JEDEC speed.
The module also supports lower standardized data rates, but actual operating speed is determined by the system.
Factors that can reduce memory speed include:
Processor memory-controller limitations
Server of installed DIMMs
Number of DIMMs per channel
Processor configuration
Memory population
Other installed memory
A DDR4-3200 module installed in an otherwise compatible DDR4-2933 system may therefore operate at 2933 MT/s rather than 3200 MT/s.
Matching Existing Memory
For applications requiring an exact replacement, compare the complete manufacturer part matching characteristics include:
32GB DRAM density
SK hynix A-die DRAM
Do not substitute a 2Rx4 module solely because it has the same 32GB capacity and DDR4-3200 speed without first confirming that the platform and desired memory configuration support the change.
