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Four green DDR5 RDIMM modules without heat spreaders in a matched kit

NEMIX RAM

NEMIX RAM DDR5 4800 ECC Registered RDIMM 128GB (4x32GB) CL40 1.1V memory upgrade

SKU CH-DZ99-HFXSX

128 GB DDR5-4800 ECC registered RDIMM kit (4 × 32 GB) validated for the Gigabyte MZ33-AR1 motherboard

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 128GB 4X32GB

Show 18 more
  • 128 GB total capacity from a matched 4 × 32 GB kit for full server density
  • DDR5 4800 (PC5-38400) speed recognised at rated frequency by the memory controller
  • Registered ECC RDIMM with 2Rx8 organisation offloads the controller and corrects single-bit errors
  • 1 V operation at CL40 timing matches the platform's exact voltage and latency requirements
  • Validated for the GIGABYTE MZ33-AR1 motherboard using the required 288-pin RDIMM form factor

Purpose-built server memory kit

This 128GB kit contains four 32GB DDR5 4800 RDIMMs built for the GIGABYTE MZ33-AR1 motherboard. Each module runs at 1.1V with CL40 timing and a 2Rx8 registered ECC layout that matches the board's memory controller expectations.

Upgrade path from smaller or non-ECC kits

Replacing partial populations or UDIMM sets with this fully populated RDIMM kit lets the registered buffer absorb electrical load so every slot operates at the rated 4800 speed. The jump is worthwhile when workloads need maximum capacity per channel and on-the-fly single-bit error correction without unplanned downtime.

Platform limits of the DDR5 RDIMM interface

The 288-pin registered form factor only fits motherboards wired for RDIMM signalling; it will not seat in UDIMM or SODIMM slots. Population rules and maximum supported capacity per slot are defined by the specific server platform, so the system manual must be consulted before installation.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $3,690.99
Pricier than about 75% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $28.84 per GB
Pricier than about 81% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-328K4
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Processor
ChipsetMajor OEM Samsung, Micron, Hynix
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsGIGABYTE
In the box
Included items128 GB 4 × 32 GB DDR5 4800 MHz PC5-38400 2Rx8 1.1 V 288-PIN ECC RDIMM KIT

Other versions of this model

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Questions about this item

Will the 288-pin RDIMM modules fit the GIGABYTE MZ33-AR1 motherboard's DDR5 slots?

Yes, the 288-pin Registered DIMM form factor matches the DDR5 slots on the GIGABYTE MZ33-AR1 motherboard exactly.

What population order should I follow when installing the four 32GB modules?

Consult the motherboard manual for the approved DIMM population sequence; the kit is spec-matched to the board's rules but the manual defines the exact slot order.

Do these Registered ECC modules require any firmware updates or ongoing maintenance?

No firmware updates are needed for the memory itself; ECC operates automatically, and the modules carry a lifetime replacement warranty if a fault ever occurs.

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