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Green rectangular DDR4 memory module with black chips on both sides and gold contacts along the bottom edge

SAMSUNG

SAMSUNG M386A4G40DM0-CPB 32GB DDR4 2133 ECC LRDIMM server RAM

SKU CH-M7R1-FQ5HH MPN M386A4G40DM0-CPB

32 GB DDR4 2133 ECC load-reduced server memory module with CL15 timing at 1.2 V

  • Total capacity32 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL15
  • Memory timings15-15-15
  • Rated voltage1.2 V
  • 32 GB capacity supports larger server workloads
  • Load Reduced DIMM design enables higher memory density
  • ECC protection detects and corrects data errors
  • DDR4 2133 speed with CL15 latency delivers responsive performance
  • 20 V operation reduces power consumption and heat

32 GB LRDIMM for server workloads

This SAMSUNG M386A4G40DM0-CPB module delivers 32 GB of DDR4 2133 memory with ECC and load-reduced buffering. It targets enterprise servers that require high-capacity DIMMs and data-integrity protection for mission-critical applications. The 288-pin form factor fits standard DDR4 server slots.

Sustained operation at 1.20 V and CL15

The module runs at 1.20 V with 15-15-15 timings and CAS latency 15, keeping power draw and heat low during continuous multi-threaded loads. Load-reduced architecture reduces electrical loading on the memory bus, allowing larger memory configurations to remain stable over extended periods. ECC corrects single-bit errors in real time, preventing silent data corruption during long compute jobs.

Installation notes and common pitfalls

The DIMM installs like any 288-pin DDR4 module, but the motherboard must explicitly support LRDIMM technology and 4Rx4 rank organisation. Mixing LRDIMMs with registered or unbuffered DIMMs will prevent the system from posting. Verify that the server BIOS recognises load-reduced modules before populating all slots.

How it compares

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

Price $215.99
Typical for this category: the median of 6,523 items is $188.99.
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $6.75 per GB
Cheaper than about 56% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameSAMSUNG
Model nameM386A4G40DM0-CPB
Total capacity32 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL15
Memory timings15-15-15
ECC supportYes
Buffer typeLoad Reduced
Memory rank4Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Size & build
Shipping weight0.04 kg
Package size169 × 52 × 15 mm

Questions about this item

How much heat and power does the 32GB DDR4 2133 LRDIMM produce when running continuously?

The module operates at 1.20 volts, the standard DDR4 voltage, so power draw per stick stays low and heat output remains modest even under sustained load.

What motherboard slot and memory channel configuration does this 288-pin DDR4 2133 ECC LRDIMM require?

It fits a 288-pin DDR4 slot and needs a platform that supports Load Reduced DIMMs with ECC and 4Rx4 organisation.

Can this 32GB DDR4 2133 CL15 LRDIMM run alongside older registered DDR4 ECC modules in the same server?

Mixing LRDIMMs with standard registered DIMMs is not supported; all slots must use the same memory technology for the system to operate correctly.

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