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Two green DDR5 RDIMM modules without heat spreaders, 288-pin, 256GB kit

NEMIX RAM

NEMIX RAM 256GB (2x128GB) DDR5 4800 CL40 2Rx4 ECC RDIMM memory upgrade

SKU CH-0G0B-4S1NV

256 GB DDR5 kit with two 128 GB ECC registered RDIMMs at 4800 MHz CL40, validated for ASRock Rack GENOA2D24G-2L+ motherboards

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • ChipsetMajor OEM Samsung, Micron, Hynix
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered

Size 256GB 2X128GB

Show 4 more
  • 256 GB capacity across two 128 GB modules for high-density server workloads
  • DDR5 4800 speed with CL40 latency delivers rated throughput for compatible platforms
  • Registered ECC architecture corrects single-bit errors and stabilises fully populated channels
  • 10 V operation matches the motherboard's voltage requirement for reliable operation
  • Verified fitment with ASRock Rack GENOA2D24G-2L+ ensures correct 288-pin RDIMM form factor

256GB DDR5-4800 ECC RDIMM Kit

This 256GB kit contains two 128GB DDR5 registered DIMMs rated at 4800 MT/s with CL40 latency and 1.1V operation. It is built for servers and workstations that require ECC error correction and registered buffering to maintain stability when all memory slots are populated.

288-pin RDIMM form factor and registered design

The modules use the 288-pin RDIMM form factor required by the ASRock Rack GENOA2D24G-2L+ motherboard. Registered architecture reduces electrical load on the memory controller, allowing full-capacity operation across populated slots, while the lack of heat spreaders keeps the profile compatible with dense server chassis.

DDR5-4800 bandwidth and population rules

The DDR5-4800 interface delivers PC5-38400 throughput, but actual capacity and speed depend on the motherboard's qualified vendor list and DIMM population order. Systems that do not support 2Rx4 registered modules at this density will not recognise the full 256GB or may fall back to lower speeds.

How it compares

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

Price $7,279.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.44 per GB
Pricier than about 80% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameNEMIX RAM
Product lineNEMIX RAM Original Series Server Memory
Model nameDDR5 ECC RDIMM Registered Server Memory
Part numberMR38400-724K2
Total capacity256 GB (2 × 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
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsASRock Rack
In the box
Included items256 GB 2 × 128 GB DDR5 4800 MHz PC5-38400 2Rx4 1.1 V 288-PIN ECC RDIMM KIT

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Questions about this item

What speed does the DDR5 4800 interface cap at in practice?

The modules run at DDR5 4800 (PC5 38400) with CL40 latency and 1.1V as specified for the ASRock Rack GENOA2D24G-2L+ motherboard.

What physical slot and form factor does this 288-pin RDIMM kit need to fit?

It requires 288-pin DDR5 RDIMM slots on the ASRock Rack GENOA2D24G-2L+ motherboard; it will not fit UDIMM or SODIMM sockets.

How is the 2Rx4 ECC RDIMM kit installed, and which population step is often missed?

Insert both 128GB modules into the slots listed first in the motherboard manual's population order; skipping that sequence can prevent full 256GB recognition.

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