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Green rectangular DDR4 server memory module with gold contacts and black chips

SAMSUNG

SAMSUNG M393AAG40M32-CAE 128GB DDR4 3200 ECC Registered 4Rx4 server RAM

SKU CH-6W3F-R7W1R MPN M393AAG40M32-CAE

128 GB DDR4 server memory running at 3200 MHz with ECC registered 4Rx4 reliability

  • 128 GB capacity supports memory-intensive workloads
  • DDR4 3200 speed delivers 25600 MB/s bandwidth
  • ECC registered design corrects errors for server reliability
  • 4Rx4 organisation enables high-density module configuration

128GB DDR4 3200 ECC Registered Module

This 128GB DDR4 3200 ECC Registered module is built for enterprise servers that require maximum memory capacity per slot. The 4Rx4 organisation and registered buffer reduce electrical load on the memory controller, allowing dense population in multi-socket platforms. Error-correcting code protects data integrity for mission-critical workloads.

Upgrade from lower-density DDR4 RDIMMs

Replacing smaller RDIMMs with this 128GB unit raises total system memory without consuming additional DIMM slots, which is valuable when slot count is limited. The step is worthwhile when applications demand more addressable memory than current modules provide and the platform supports 4Rx4 registered DIMMs at 3200 MT/s. It does not suit workstations or desktops that cannot address registered ECC memory.

How it compares

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

Price $981.99
Pricier than about 80% of the 6,523 comparable items (median $188.99).

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Specifications

Size & build
Shipping weight0.09 kg
Package size178 × 51 × 5 mm

Questions about this item

What slot type and form factor does this 128 GB DDR4 3200 module require?

It uses a standard 288-pin DDR4 RDIMM slot and fits the regular server DIMM height.

Which BIOS setting is commonly missed when installing this 4Rx4 registered ECC memory?

Enable ECC and registered mode in the memory configuration menu, then verify all ranks are detected at 3200 MT/s.

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