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Green circuit board with black memory chips, gold edge connector, no heat spreader

Kingston Technology Corp.

Kingston Technology Corp. KSM48R40BD4-64HA 64GB DDR5 RDIMM server RAM

SKU CH-0YWM-EM2CZ MPN KSM48R40BD4-64HA

A 64 GB DDR5 registered DIMM with ECC, CL40 latency and 4800 MHz speed for server motherboards

  • Capacity64GB
  • Type288-Pin DDR5 RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Timing40-39-39
  • Voltage1.10V

Capacity 64GB

Rank 2Rx4

Option Hynix, DRAM Lock

  • 64 GB capacity supports large server workloads
  • DDR5 4800 speed delivers high memory bandwidth
  • ECC protection detects and corrects data errors
  • Registered signal processing improves system stability
  • CL40 latency with 40-39-39 timing optimises response

Server DDR5 RDIMM with ECC

This 64 GB registered DDR5 module is built for servers and workstations that require error-correcting memory. It operates at 4800 MHz with a CAS latency of CL40 and a voltage of 1.10 V. The dual-rank 2Rx4 organisation helps maximise capacity per slot.

DDR5-4800 bandwidth ceiling

The PC5-38400 interface delivers 38400 MB/s of theoretical peak bandwidth per module. Real-world throughput is limited by the memory controller and the number of populated channels. Mixing speeds will force all modules to run at the lowest common rate.

64 GB single-module capacity

A single 288-pin RDIMM provides 64 GB, allowing high total memory without filling every slot. This suits configurations that need maximum density per channel. Systems that only accept unbuffered UDIMMs or lower-density modules cannot use this part.

Highlights

  • 64 GB capacity supports large server workloads
  • DDR5 4800 speed delivers high memory bandwidth
  • ECC protection detects and corrects data errors
  • Registered signal processing improves system stability
  • CL40 latency with 40-39-39 timing optimises response

Specifications

BrandKingston
ModelKSM48R40BD4-64HA
Capacity64GB
Type288-Pin DDR5 RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Timing40-39-39
Voltage1.10V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Shipping weight0.09 kg
Package size165 × 51 × 8 mm

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Questions about this item

Should I choose a single 64GB module or multiple smaller modules for my server?

This is a single 64GB DDR5-4800 RDIMM with 2Rx4 organisation, ECC and registered signal processing. Using one module fills one slot; adding identical modules increases total capacity and enables multi-channel bandwidth.

What does the 4800 MHz speed deliver in a running system?

The module operates at DDR5-4800 with CL40-39-39 timings at 1.10V. Actual data rate depends on the memory controller and how many channels are populated.

How does the 288-pin DDR5 RDIMM interface limit performance?

The 288-pin DDR5 RDIMM form factor carries the DDR5-4800 signal with on-module register and ECC. Maximum throughput is set by the platform's memory controller and channel count.

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