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Six bare green DDR5 RDIMM modules, 288-pin, no heat spreader

NEMIX RAM

NEMIX RAM 768GB (6x128GB) DDR5 4800 CL40 ECC RDIMM memory upgrade

SKU CH-7RF2-RKB0K

Six 128 GB DDR5 ECC registered DIMMs deliver 768 GB at 4800 MT/s CL40 for ASUS RS720Q-E11-IM servers

  • 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 with six 128 GB modules
  • DDR5 4800 speed rated at PC5-38400 for high bandwidth
  • CL40 CAS latency at 1.10 V registered operation
  • ECC registered RDIMM design protects data integrity
  • 288-pin 4Rx4 configuration built for ASUS RS720Q-E11-IM server

Capacity and Compatibility

This 768GB kit delivers six 128GB DDR5 4800 ECC registered DIMMs built for ASUS 2U4N high-density immersion-cooling servers. It targets IT professionals who need maximum memory density in a validated configuration for mission-critical workloads.

Sustained Load Behaviour

Modules are rigorously stress-tested under load to ensure stability during continuous operation in enterprise environments. ECC and registered buffering maintain data integrity across all 768GB while the 1.1V operating voltage supports efficiency in dense, immersion-cooled chassis.

Pre-Installation Checks

Verify that your ASUS RS720Q-E11-IM motherboard accepts 4Rx4 288-pin RDIMMs at DDR5 4800 with CL40 timing. Confirm the system BIOS supports the full 768GB capacity across all six slots and that the immersion cooling loop is rated for the memory thermal profile.

How it compares

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

Price $22,536.99
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 $29.35 per GB
Pricier than about 83% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineASUS Server Motherboard Compatible Series Memory
Model nameASUS 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 systemsASUS
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

How much heat does the 768 GB DDR5 4800 CL40 ECC RDIMM kit add when the server runs all day?

Each 128 GB module runs at 1.1 V, so the six stick kit draws minimal power and produces little extra heat inside the ASUS RS720Q-E11-IM chassis.

What must the system already provide for these 288 pin DDR5 RDIMMs to work?

The motherboard needs DDR5 RDIMM slots that support 4Rx4 registered ECC modules at 4800 MT/s and a BIOS that can initialise 768 GB total capacity.

Will the CL40 4Rx4 sticks run alongside any older DDR5 RDIMMs I keep in the same server?

All six slots should use identical 4800 MT/s CL40 4Rx4 modules; mixing different ranks or speeds can prevent the system from booting.

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