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Green rectangular DDR5 server memory module with black chips and gold contacts

Kingston Technology Corp.

Kingston Technology Corp. KSM48R40BD4TMM-64HMR 64GB DDR5 4800 ECC Registered DIMM server RAM

SKU CH-2WKZ-H0Q7K MPN KSM48R40BD4TMM-64HMR

A 64 GB DDR5 registered ECC DIMM running at 4800 MT/s with CL40 timings at 1.10 V

  • Total capacity64 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Memory timings40-39-39
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 64 GB capacity supports large server workloads
  • DDR5-4800 speed delivers 38400 MB/s bandwidth
  • ECC registered design corrects errors and stabilises signals
  • CL40 40-39-39 timings tuned for 4800 MHz operation
  • 10 V voltage reduces power draw per module

Capacity and registration

This 64 GB DDR5 registered DIMM is built for servers and workstations that require error-correcting memory at native 4800 MT/s. The module uses a 288-pin form factor and operates at 1.10 V with CL40-39-39 timings.

Registered ECC requirement

Systems that accept registered DDR5 ECC modules can use this part; platforms limited to unbuffered memory or to a different DDR generation cannot. Buyers needing non-ECC or lower-capacity sticks should select a different product.

4800 MT/s speed rating

The single specification that decides fit is the DDR5-4800 (PC5-38400) speed grade. The motherboard and processor must support this exact data rate for the module to run at its rated frequency.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $542.99
Pricier than about 72% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $8.48 per GB
Pricier than about 60% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameKingston
Model nameKSM48R40BD4TMM-64HMR
Total capacity64 GB
Product type288-PIN DDR5 R-DIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
Memory timings40-39-39
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.1 V
Size & build
Shipping weight0.32 kg
Package size142 × 43 × 8 mm

Questions about this item

Will this 288-pin DDR5 R-DIMM fit my motherboard's DDR5 slots?

This module uses the standard 288-pin DDR5 R-DIMM form factor. It fits motherboards with DDR5 registered DIMM slots that support ECC memory.

Can I mix this CL40 4800 MHz module with slower DDR5 ECC RDIMMs I already have?

The system will run all installed modules at the speed and timings of the slowest kit. This module operates at 4800 MHz with 40-39-39 timings at 1.10 V.

How do I confirm the 64 GB module is running at DDR5 4800 with ECC active?

Check the BIOS memory information or use a tool like CPU-Z. It should report 4800 MT/s, CL40 timings, 1.10 V, and show ECC as enabled for this 64 GB DIMM.

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