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Six green DDR5 RDIMM sticks with black chips, no heat spreaders

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 PC5-38400 CL40 1.1V 4Rx4 ECC RDIMM memory upgrade

SKU CH-M9S9-SRJKC

A 768 GB DDR5 4800 registered ECC kit of six 128 GB modules at CL40 and 1.1 V for SuperMicro IOT SuperServer SYS-221HE systems

  • Total capacity768 GB (6 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Buffer typeRegistered
  • Rated voltage1.1 V
  • 768 GB total capacity for memory-intensive server workloads
  • DDR5 4800 speed with CL40 latency for responsive data access
  • ECC registered design detects and corrects single-bit errors automatically
  • 1 V operating voltage reduces power draw per module
  • Validated for SuperMicro SuperServer SYS-221HE series compatibility

768 GB DDR5 kit for Supermicro servers

This six-module kit delivers 768 GB of DDR5 4800 registered ECC memory for compatible Supermicro platforms. Each 128 GB module operates at 1.1 V with CL40 latency and a 4Rx4 organisation. The kit targets administrators who need maximum capacity in supported SuperServer systems.

288-pin RDIMM modules require registered ECC slots

Modules fit 288-pin DDR5 RDIMM sockets on qualified Supermicro motherboards such as the SYS-221HE-FTNR, SYS-221HE-FTNRD and SYS-221HE-TNR. Registered signalling and on-die ECC reduce electrical load on the memory controller, freeing electrical headroom for full population. Builders must verify the platform supports 4Rx4 densities before installation.

Sustained throughput with ECC integrity

Registered buffering and error-correcting code maintain data integrity during continuous server workloads. The 4800 MT/s data rate and 1.1 V operation keep power draw stable across all six modules under prolonged load. Systems without registered ECC support or 4Rx4 compatibility cannot use this kit.

How it compares

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

Price $21,660.99
Pricier than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 768 GB (6 × 128 GB)
Higher than about 92% of the 20,941 comparable items (median 32 GB).
Price per GB $28.20 per GB
Pricier than about 79% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineSuperMicro Server/Workstation Compatible Series Memory
Model nameSuperMicro DDR5 4800 MHz ECC RDIMM Registered Server Memory
Part numberMR38400-744K6
Total capacity768 GB (6 × 128 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
Heat spreaderNo
Memory rank4Rx4
Power
Rated voltage1.1 V
Compatibility
Compatible systemsSupermicro
In the box
Included items768 GB (6 × 128 GB) DDR5 4800 MHz PC5-38400 4Rx4 1.1 V CL40 288-PIN ECC RDIMM Registered Server Memory KIT

Questions about this item

Does the CL40 latency become a bottleneck during sustained server workloads?

CL40 is the rated CAS latency at DDR5 4800 speed; the registered design and ECC maintain signal integrity and data accuracy under continuous load.

How much heat and power does the 768GB kit produce when running all day?

Each 128GB module operates at 1.1V without a heat spreader; the registered DDR5 RDIMM design keeps power draw and thermals within standard server DIMM limits.

Which motherboard slot layout is required for the 6x128GB 288-pin RDIMM kit?

The kit needs six DDR5 RDIMM slots on a Supermicro IOT SuperServer SYS-221HE-FTNR, SYS-221HE-FTNRD or SYS-221HE-TNR platform.

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