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Green circuit board with black memory chips in a row

SAMSUNG

SAMSUNG M393A4K40BB0-CPB0 32GB DDR4 2133 Registered server RAM

SKU CH-ZXXV-5WGP4 MPN M393A4K40BB0-CPB0

32 GB DDR4 2133 registered ECC module with CL15 latency and 1.20 V operation

  • Total capacity32 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Product type288-Pin DDR4 SDRAM
  • 32GB capacity supports large server workloads
  • DDR4 2133 speed delivers 17000 MB/s bandwidth
  • Registered design improves signal integrity for stability
  • CL15 latency provides responsive data access
  • 20V operation reduces power consumption

32 GB registered DDR4 for servers

This module delivers 32 GB of DDR4 2133 memory in a registered design. It targets servers and workstations that require error-correcting capacity with 2Rx4 organisation. The 288-pin form factor fits standard DDR4 slots. Systems needing unbuffered memory or higher speeds should look elsewhere.

Thermals and power at 1.20 V

Operating at 1.20 V keeps power draw modest for a 32 GB registered stick. No heat spreader is fitted, so airflow across the PCB handles cooling. The CL15 latency at 2133 MT/s produces predictable thermal output under sustained loads. Acoustic impact depends entirely on the chassis fans.

Registered design and 2Rx4 layout

The registered buffer reduces electrical load on the memory controller, enabling larger total capacities per channel. The 2Rx4 organisation increases density without adding ranks beyond what the platform expects. No software or accessories are bundled; the module itself provides the registered and density benefits.

How it compares

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

Price $283.99
Pricier than about 60% 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 $8.87 per GB
Pricier than about 62% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameSAMSUNG
Model nameM393A4K40BB0-CPB0
Total capacity32 GB
Product type288-Pin DDR4 SDRAM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
Buffer typeRegistered
Heat spreaderNo
Power
Rated voltage1.2 V
Size & build
Shipping weight0.14 kg
Package size165 × 51 × 13 mm

Questions about this item

How do I install the 288-pin DDR4 module and which orientation mistake should I avoid?

Align the notch on the module with the key in the 288-pin slot, press straight down until both retaining clips click, and do not force it backwards — the off-centre notch prevents reverse insertion.

What maintenance or replacement will the registered 2Rx4 module need later?

No routine maintenance is required; the module has no heat spreader and no moving parts, so replacement is only necessary if a memory test reports errors or capacity needs increase.

At what point does the CL15 latency at 1.20 V become the limiting factor under sustained load?

The CL15 timing at the rated 1.20 V is the first fixed limit; sustained throughput cannot exceed the latency budget set by the registered 2Rx4 organisation.

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