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Green bare circuit board DDR5 288-pin registered DIMM with black memory chips

Kingston Technology Corp.

Kingston Technology Corp. KSM48R40BS4TMM-32HMR 32GB DDR5 4800 CL40 1Rx4 ECC Registered Server RAM

SKU CH-BY0N-ZR981 MPN KSM48R40BS4TMM-32HMR

32 GB DDR5 registered ECC module running at 4800 MT/s with CL40 latency and 1.10 V operation

  • Total capacity32 GB
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetHynix M Rambus
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • 32 GB capacity for demanding server workloads
  • DDR5 4800 speed delivers high bandwidth
  • ECC registered design protects data integrity
  • Single-rank 1Rx4 layout optimises signal quality
  • Low 1.10 V voltage reduces power draw

Server memory module

This is a 32GB DDR5 4800 registered DIMM with ECC and CL40 latency. It is built for enterprise servers and workstations that require error-correcting registered memory. Buyers who need unbuffered desktop modules or non-ECC memory should look elsewhere.

Registered ECC specification

The module operates as a single-rank 1Rx4 registered DIMM at 1.10V with CAS latency 40. This specific registered ECC configuration is the deciding factor for compatibility with server motherboards that require registered memory. Systems that accept only unbuffered DIMMs cannot use this module.

Standard 288-pin installation

Installation follows the usual 288-pin DDR5 DIMM procedure: align the notch, press firmly until the retention clips engage. Common issues arise when the platform expects unbuffered memory or a different rank configuration, causing the system to fail POST. Always verify the motherboard supports registered ECC DDR5 before fitting.

How it compares

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

Price $253.99
Pricier than about 57% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $7.94 per GB
Pricier than about 56% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameKingston
Model nameKSM48R40BS4TMM-32HMR
Total capacity32 GB
Product type288-PIN DDR5 R-DIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetHynix M Rambus
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Size & build
Shipping weight0.45 kg
Package size142 × 41 × 3 mm

Questions about this item

What does the DDR5 4800 rating mean once the module is installed in a server?

The module operates at 4800 MT/s with CL40 latency, delivering the standard DDR5 4800 data rate when the platform runs memory at that speed.

How does the 288-pin DDR5 R-DIMM interface limit performance in practice?

The registered 288-pin DDR5 interface supports the 4800 MT/s data rate and ECC, and the registered buffer adds one cycle of address/command delay as per the DDR5 RDIMM specification.

What physical clearance does the 32 GB DDR5 module need to fit in a server chassis?

The module is a standard-height 288-pin DDR5 R-DIMM without a heat spreader, so it fits any slot that accepts full-height registered DDR5 DIMMs.

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